Practice Test


Q1) Annual growth rate for developing countries is: Show Answer


Q2) Study of interrelationship between living organisms and their environment is called: Show Answer


Q3) Plants and animals living in a given area constitute: Show Answer


Q4) Carrying capacity of an environment is determined by: Show Answer


Q5) If there is a large gap between birth rate and death rate in Haryana we can infer that Haryana would tend to have: Show Answer


Q6) Demography is the study of statistics that deals with: Show Answer


Q7) Parameter for describing a population is: Show Answer


Q8) Most thickly populated state in India is: Show Answer


Q9) Most thinly populated state in India is: Show Answer


Q10) Which of the following is monogamous: Show Answer


Q11) Which of the following is polygamous? Show Answer


Q12) Which of the following lives in flocks? Show Answer


Q13) Animal found in herd is: Show Answer


Q14) The human population first began to grow exponentially at the time of: Show Answer


Q15) About how many people starve to death each day? Show Answer


Q16) The growth of human population is most rapid in: Show Answer


Q17) What constitutes the most important boundary between different species? Show Answer


Q18) Offspring of a stallion and janet is called: Show Answer


Q19) Population density is expressed by: Show Answer


Q20) Fingers and legs are shorter in colder regions. It is: Show Answer


Q21) Population whose members reproduce asexually are termed: Show Answer


Q22) Population whose members reproduce sexually are termed: Show Answer


Q23) The study of interactions of an individual organism or a single species with the living and non-living component of its environment is: Show Answer


Q24) Ecological studies of plants were first started by: Show Answer


Q25) Synecology refers to the ecological study of: Show Answer


Q26) All the living organisms on earth constitute: Show Answer


Q27) Individuals of the same species in a particular locality constitute: Show Answer


Q28) Migration refers to: Show Answer


Q29) Which of the following is an example of protoco-operation? Show Answer


Q30) Gametophyte and sporophyte stages of a fern plant should ecologically be considered as: Show Answer


Q31) Which of the following is related with synecology? Show Answer


Q32) Competition is most severe in two: Show Answer


Q33) Territory is defended against: Show Answer


Q34) Which of the following shows the polymorphism? Show Answer


Q35) Cross-fertilization in plants is a kind of: Show Answer


Q36) An interaction between two or more organisms when the resource necessary for them are limited, refers to: Show Answer


Q37) Sub-groups of a population capable of interbreeding are called as: Show Answer


Q38) In red deer, the herd is: Show Answer


Q39) Biotic potential is counteracted by: Show Answer


Q40) The carrying capacity is determined by its: Show Answer


Q41) A population can grow exponentially: Show Answer


Q42) Which of the following does not directly affect biotic potential? Show Answer


Q43) Sympatric population cannot be isolated by: Show Answer


Q44) Term species in ecology refers to: Show Answer


Q45) Population surge 230 years ago was due to: Show Answer


Q46) The levelling of an S-shaped curve describing population growth is caused by: Show Answer


Q47) The abundance of a species population within its habitat is called: Show Answer


Q48) Mule is produced by breeding: Show Answer


Q49) When population reaches carrying capacity: Show Answer


Q50) Pheromones secreted by certain exocrine cutaneous gland affect: Show Answer


Q51) Area covered by members of a species in search of food and mates is called: Show Answer


Q52) Crow also incubates the eggs of: Show Answer


Q53) Pheromones of insects are: Show Answer


Q54) Population density of aquatic organisms is expressed in terms of individuals per: Show Answer


Q55) Which of the following factors is not determinant of population size? Show Answer


Q56) The dominant individual in a herd is: Show Answer


Q57) Tiger has a: Show Answer


Q58) Which of these helps in the survival of a species? Show Answer


Q59) Honey bees perform dancing motion to signal: Show Answer


Q60) Emigration affects population in: Show Answer


Q61) Brown skinned human race: Show Answer


Q62) The members or a form of polymorphic species: Show Answer


Q63) Cooperative interaction is essential for prepetuation of: Show Answer


Q64) The aggregate of processes that determine the size and composition of any population is termed as: Show Answer


Q65) When a tiger attacks cheetals, the stag with best antlers is surrounded by other individuals to protect it. It is an example of: Show Answer


Q66) Which of the following leads a solitary life? Show Answer


Q67) Family formation is a characteristic feature of: Show Answer


Q68) Which among the following does not lead a monogamous life? Show Answer


Q69) Rats are: Show Answer


Q70) Ants communicate through: Show Answer


Q71) Altruistic behaviour is found in: Show Answer


Q72) The factor which does not affect the population size is: Show Answer


Q73) Rapid decline in a population due to high mortality rate is: Show Answer


Q74) According to 1991 Census, urban population of India was about: Show Answer


Q75) A fertile hybrid between captive tiger and lioness is: Show Answer


Q76) Which of the following chemical compound helps in transmitting the message to other members of the same species? Show Answer


Q77) The population tends to increase as individuals are added by: Show Answer


Q78) The population tends to decrease by: Show Answer


Q79) The most distinct and easily observation unit is: Show Answer


Q80) The occurrence of two forms among the organisms of same kind is known as: Show Answer


Q81) A green alga Volvox, a colonial form consists of over: Show Answer


Q82) The chemicals of intraspecific communication are: Show Answer


Q83) Human society is a product of: Show Answer


Q84) Which of the following morphological forms is also known as ecophenes? Show Answer


Q85) The relationship between one species and another within a community that has evolved through interactions is based upon: Show Answer


Q86) The interaction among organisms in a community called as biotic factors influence: Show Answer


Q87) According to the species equilibrium theory, smaller island have fewer species because they have: Show Answer


Q88) Competition between individuals of the species is called: Show Answer


Q89) Which of the following levels of organisation emphasizes the structural aspects in terms of relation and requirement of organisms? Show Answer


Q90) Synecology is study of: Show Answer


Q91) The leaves are absent in the xerophyte: Show Answer


Q92) Which of the following feature is found in xerophytes? Show Answer


Q93) Halophytes growing on mud are called as: Show Answer


Q94) Euhalophytes grow where the concentration of NaCI ranges: Show Answer


Q95) The product arising as a result of geographical response of an ecospecies to a particular habitat is the definition of: Show Answer


Q96) Members of biological species are potentially able to: Show Answer


Q97) Which of the following niches is concerned with the trophic position of an organism? Show Answer


Q98) Plants growing on rocks are called as: Show Answer


Q99) Plants growing on cold soil are called as: Show Answer


Q100) Mark the free floating hydrophyte: Show Answer


Q101) Mark the rooted submerged hydrophyte: Show Answer


Q102) The mesophytes are characterised by: Show Answer


Q103) Mark the true xerophyte: Show Answer


Q104) The keystone species in an ecosystem are those which: Show Answer


Q105) The sphere of living matter together with water, air and soil on the earth is called: Show Answer


Q106) Plants with irreversible and genetically fixed adaptations are known as: Show Answer


Q107) Species which has a restricted distribution is called: Show Answer


Q108) Study of communities, especially their environmental relationship and structure, is known as: Show Answer


Q109) When the organisms live together in such a manner that one organism is benefited while the other remains unaffected. This type of association is called: Show Answer


Q110) The part of earth and atmosphere supporting life is: Show Answer


Q111) Term 'biocoenosis' was coined by: Show Answer


Q112) Number of immigration is more than emigration and death is lower than natality. Growth curve of population will show: Show Answer


Q113) Which one of the following have raised cheek bones, oblique eyes and yellowish skin colour? Show Answer


Q114) Scent producing glands are: Show Answer


Q115) Pheromone is: Show Answer


Q116) Percentage ratio of natality over mortality is: Show Answer


Q117) Human population shows: Show Answer


Q118) The process of mating of individuals which are more closely related than the average of the population to which they belong is called: Show Answer


Q119) Adaptation of a species is its: Show Answer


Q120) Asymptote is a stage when a population is: Show Answer


Q121) Two species cannot occupy the same niche. This law is known as: Show Answer


Q122) Broad-leaved forest oak are found in: Show Answer


Q123) Prolonged liberal irrigation of agricultural field likely to create the problem of: Show Answer


Q124) At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation? Show Answer


Q125) Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example: Show Answer


Q126) There exists a close association between the alga and the fungus within a lichen. The fungus: Show Answer


Q127) Identify the correctly matched pair: Show Answer


Q128) The ability of the Venus fly trap to capture insects is due to: Show Answer


Q129) Sunderban contains mainly: Show Answer


Q130) Pneumatophores are present/common in: Show Answer


Q131) Which one of the following correctly represents an organism and its ecological niche? Show Answer


Q132) Humidity in atmosphere decreases rate of: Show Answer


Q133) Niche overlap indicates: Show Answer


Q134) Annual migration does not occur in the case of: Show Answer


Q135) Geometric representation of age structure is a characteristic of: Show Answer


Q136) Which one of the following is categorised as a parasite in true sense? Show Answer


Q137) Consider the following four conditions (a-d) and select the correct pair of them as adaptation to environment in desert lizards.
The conditions:
(a) Burrowing in soil to escape high temperature
(b) Losing heat rapidly from the body during high temperature
(c) Bask in sun when temperature is low
(d) Insulating body due to thick fatty dermis Show Answer


Q138) The ecological levels of organisation in terms of complexity are arranged in the order: Show Answer


Q139) The role of an organism in the ecological system is known as: Show Answer


Q140) The kangaroo rat and camel adapt to dry and hot conditions in the deserts by: Show Answer


Q141) Adaptation to low temperature and freezing in animals occurs due to the production of: Show Answer


Q142) Which of the following are important components of environment? Show Answer


Q143) Who is regareded as father of ecology in India: Show Answer


Q144) The word ecology was given by: Show Answer


Q145) Which of the following is correct order of biological organisation ranging from organism to biosphere? Show Answer


Q146) The basic unit of study in ecology is/are: Show Answer


Q147) What is landscape? Show Answer


Q148) On the basis of variation in mean temperature along latitude, the temperate climatic region is at: Show Answer


Q149) Ecological niche of an organism represents: Show Answer


Q150) Temperature decreases with increasing height in troposphere upto: Show Answer


Q151) Phenology refers to the timing of season activites of plants in relation to changes in environmental condition. In many animals, migration, hibernation and reproductive behaviour are controlled by: Show Answer


Q152) The limnetic zone is: Show Answer


Q153) The individual plants as well as plant communities adapt to different light intensities. The plants are shade tolerant are called: Show Answer


Q154) Which of following show periodic type of migration in search of feeding ground? Show Answer


Q155) Batesian mimicry is shown by: Show Answer


Q156) Which of the following is an example of physiological xerophyte? Show Answer


Q157) Ecology is basically concerned with four levels of biology organizations. These levels are Show Answer


Q158) Which of the following accounts for the formation of major biomes? Show Answer


Q159) A regional ecological unit having a specific climate is Show Answer


Q160) Major biomes of India include Show Answer


Q161) What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats? Show Answer


Q162) False statement is Show Answer


Q163) Select the false statement Show Answer


Q164) A few organisms can tolerate and thrive a wide range of temperature. Such animals are called _______. A vast majority of animals are restricted to a narrow range of temperature. Such animals are called ______. Show Answer


Q165) Snow leopards are not found in Kerala forests. Which factor is responsible for it? Show Answer


Q166) Next to temperature, which is the most important factor influencing the life of organisms? Show Answer


Q167) Life Show Answer


Q168) Each of the following is an important factor in determining the productivity of fresh water lake except Show Answer


Q169) Which of the following is not a part of an organisms physical environment? Show Answer


Q170) Which of the following statements is false? Show Answer


Q171) I. Organisms living in oceans, lakes and rivers face water-related problems.
II. Euryhaline can tolerate a wide range of salinities.
III. Stenohaline are restricted to a narrow range of salinities.
IV. No fresh water animals cannot live for long in sea water but sea animals can live in fresh water for long times because of osmotic balance.
V. The salt concentration is less than 5% in inland water, 30-35% in sea and > 100% in some hypersaline lagoons. Show Answer


Q172) Which of the following might contribute to determining an organisms habitat? Show Answer


Q173) The location of terrestrial biomes is strongly influenced by Show Answer


Q174) The two sides of a given mountain have the same latitude and altitude. Are they likely to have the same climate? Show Answer


Q175) Seasons are influenced by Show Answer


Q176) In regions of hot temperatures and wet climate, you will most likely find ______ biomes, whereas in the regions of hot temperature and dry climate you will find ______. Show Answer


Q177) The ultimate source of energy for all ecosystems on earth is Show Answer


Q178) Animals having a built-in thermostat to maintain constant body temperature are Show Answer


Q179) Which of the following statements is false?
I. Light is essential for life to exist on the earth.
II. Many species of small plants under the canopy to tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids.
III. UV-rays are not harmful for many organisms.
IV. Photoperiodic requirement is essential for many plants for flowering.
V. Sun is the source of light and temperature on land.
VI. Red algae can live in deep sea water because of having pigment, phycoerythrin. Show Answer


Q180) Deep (> 500 m) in the oceans inhabitants are not aware of existence of a celestial source of energy called Show Answer


Q181) Many animals use the diurnal and seasonal variations in light intensity and photoperiod as cues for timing of Show Answer


Q182) The nature of soil in a given area is independent of Show Answer


Q183) Find out the false one Show Answer


Q184) Percolation and water holding capacity of soil is dependent upon Show Answer


Q185) To a large extent, the vegetation of an area is determined by Show Answer


Q186) Which of the factors dictates the types of animals in a habitat Show Answer


Q187) Which of the following factors often determine the type of benthic animals that thrive in aquatic environment? Show Answer


Q188) Which of the following term implies the maintenance of relatively constant physical and chemical conditions within organisms? Show Answer


Q189) Human can maintain homeostasis through Show Answer


Q190) Which of the following statement is false? Show Answer


Q191) I. Thermoregulation, osmoregulation and excretion are mechanisms that moderate change in the body.
II. 99% animals and almost all plants are confomers.
III. Heat loss or heat gain is a function of surface area.
IV. Thermoregulation energetically is least expensive process for many organisms like shrews and humming birds.
V. 99% animals are thermoregulators.
VI. Archaebacteria cannot tolerate high temperature. Show Answer


Q192) Why small animals are mostly not found in polar areas? Show Answer


Q193) I. Conformers are the organisms that cannot maintain a constant internal environment.
II. 99% animals and nearly all plants cannot maintain their constant internal environments.
III. During the course of evolution, the cost and benefits of maintaining a constant internal environment are discarded.
IV. Conformity is a condition in which an external challenge induces parallel internal changes.
V. Regulation is a condition in which external challenge elicits compensatory action to maintain the internal environment. Show Answer


Q194) Which one is correct?
I. In a hot climate reptiles can maintain a constant body temperature in the day by behavioural regulation.
II. The body temperature of thermoconformers changes with ambient temperature.
III. In aquatic osmoconformers, the osmolarity of body fluids changes with that of ambient water.
IV. Small animals have a larger surface area relative to their volume, therefore tend to lose body heat very fast when it is cold outside, then they have to expand much energy to generate body heat through metabolism. Show Answer


Q195) Choose the odd out w.r.t. structure formed in the different organisms during suspended phase. Show Answer


Q196) Which of the following animals would you expect to have the most efficient kidneys? Show Answer


Q197) Whales, the world's largest living mammals, live in the ocean, but there are no very small aquatic mammals why? Show Answer


Q198) Kangaroo rats Show Answer


Q199) Which of the following is an important adaptation of animals to cold climate Show Answer


Q200) Elephants use their ears to dump heat to the environment. What mechanisms might they employ to increase heat loss from ears? Show Answer


Q201) Find out the false one Show Answer


Q202) I. Basking by desert lizards in sun.
II. Hiding in burrows by some animals.
III. Wearing of woolen clothes.
IV. Thermal gaping.
The above are examples of Show Answer


Q203) Choose the odd one w.r.t. adaptations in the organisms Show Answer


Q204) Symptoms of altitude sickness include all except Show Answer


Q205) Acclimatization (compensatory mechanisms) to altitude sickness includes all except Show Answer


Q206) Organisms have evolved various mechanisms to maintain homeostasis to perform its physiological and biochemical functions. This can be obtained through Show Answer


Q207) Keoladeo National Park (Bharatpur) hosts thousands of migrating birds from Siberia and other extremely cold northern regions. This park is located in Show Answer


Q208) Adaptation is an attribute of organisms that enables them to survive and reproduce in their habitats. Adaptation Show Answer


Q209) The Kangaroo rat in North American desert do not drink water. How does it survive in such xeric condition Show Answer


Q210) Which of the following statement is false w.r.t. adaptations? Show Answer


Q211) Which of the following is false? Show Answer


Q212) If in a pond there are 20 lotus last year and through reproduction 8 new plants are added, taking current population to 28. The birth rate per year is Show Answer


Q213) If 4 individuals in a laboratory population of 40 fruitflies died during a specific time (a week) interval, the death rate in the population per week is Show Answer


Q214) Population density of terrestrial organism is measured in terms of per Show Answer


Q215) Population density of aquatic animals in some waterbody is measured in term of per Show Answer


Q216) Density of a population (D) is Show Answer


Q217) Total number of individual of a specific in an area is called Show Answer


Q218) The size of Siberian cranes at Bharatpur wetlands in any year is Show Answer


Q219) In an area, there are 200 Parthenium and a single huge banyan tree. Which of the following conclusions is correct Show Answer


Q220) Birth rate is 100, death rate is 10. Number of individuals in population group is 1000. What is the percentage of natural growth rate? Show Answer


Q221) If the age distribution (percent individuals of a given age or age group) is plotted for population, the resulting structure is called Show Answer


Q222) The age distribution of a population is determined by Show Answer


Q223) Parameters related to age structure include Show Answer


Q224) The age structure of a population is its Show Answer


Q225) The reproductive value of an individual is greatest Show Answer


Q226) If most individuals in a population are young, why is the population likely to grow rapidly in the future? Show Answer


Q227) What four factors define population growth? Show Answer


Q228) Size of population can be decreased by Show Answer


Q229) Which of the following is not a factor that would limit the growth of a population? Show Answer


Q230) A population of 100 individuals has a doubling time of 25 years. What size will this population be in 100 years? Show Answer


Q231) Which of the following statements is correct? Show Answer


Q232) Allen's rule is related to Show Answer


Q233) For which of the following cases, population density can be easily determined by utilizing non-biological parameter? Show Answer


Q234) Population growth of a species is not related to which of the following parameters? Show Answer


Q235) Which of the following can be a limit on population growth? Show Answer


Q236) Assuming that an animal generates heat at a rate proportional to its volume and can radiate heat at a rate proportional to its body surface area. Which of the following would be best at maintaining its body temperature in a cold climate Show Answer


Q237) Exponential growth occurs when there is Show Answer


Q238) Logistic growth occurs when there is Show Answer


Q239) As the number of individuals approaches the carrying capacity of a population, which of the following is predicted by the sigmoidal growth curve? Show Answer


Q240) Organisms with very high intrinsic growth rates have Show Answer


Q241) A population with a larger proportion of older individuals than younger ones will likely Show Answer


Q242) What is the fate of a population that is dominated by younger individuals and lacking older individuals? Show Answer


Q243) Biotic potential refers to Show Answer


Q244) Periodic departure and return is known as Show Answer


Q245) An "Urn" shaped population age pyramid represents Show Answer


Q246) Vital index of a population is Show Answer


Q247) A behavioural strategy of adaptation is called echolocation is found in Show Answer


Q248) Which is not related to S-shaped population curve? Show Answer


Q249) Which of the following is correct? Show Answer


Q250) I. In a population growth rate curve the lag phase represents the period when a population is adjusting to a new environment.
II. In a population growth rate curve the steepest part of growth phase represents the period when a population is growing exponentially.
III. In the stationary phase of a population growth rate curve the population is in dynamic equilibrium.
IV. Human have changed the carrying capacity of the earth.
Which of the above statements are correct? Show Answer


Q251) Which of these is an explanation of why a population can fluctuate once it has reached carrying capacity? Show Answer


Q252) Which is not an assumption for logistic growth? Show Answer


Q253) If B = 0.55, D = 0.45 and N = 1000, then dN/dt = ______ . Show Answer


Q254) Choose the correct option Show Answer


Q255) Which of the following is true concerning exponential growth? Show Answer


Q256) The population growth equation describes a population that Show Answer


Q257) The growth rate of a population in an unlimited environment Show Answer


Q258) Which of the following is not an assumption of the logistic model for population growth? Show Answer


Q259) Which of the following is true for the carrying capacity (K)? Show Answer


Q260) Scholars caught, marked and released 80 fishes in a pond. Later 100 fish were caught at random. 40 of them were marked. The number of fishes in the pond is Show Answer


Q261) A broad-based, pyramid shaped age structure is characteristic of a population that is Show Answer


Q262) A population grows rapidly at first and then levels off at carrying capacity of it is Show Answer


Q263) Carrying capacity for a population is estimated at 500; the population size is currently 400; and rmax = 0.01. What is dN/dt? Show Answer


Q264) A country that has a stable population is characterized by an age structure that is _______. Show Answer


Q265) Some organisms reproduce only once in their lifetime because they Show Answer


Q266) Darwin judged the fitness of an individual in term of Show Answer


Q267) I. Populations evolve to maximise their reproductive fitness, also called Darwinian fitness (higher r value), in the habitat in which they live.
II. The population growth rate r is inversely related to generation time.
III. The housefly, which has a short life-span and produces a large number of eggs, could be considered as a low r max species.
IV. Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategies.
V. Life history traits of organisms have evolved in relation to the constraints imposed by biotic and abiotic factors in their habitat.
Select the false statement Show Answer


Q268) Which one is true? Show Answer


Q269) Which one of the following is incorrect? Show Answer


Q270) Choose the odd one out w.r.t. parasitism Show Answer


Q271) Which of the following is correct about host-specific parasites? Show Answer


Q272) Which of the following is false?
I. The human liver fluke, a nematode parasite, depends on two intermediate hosts (snail and fish) to complete its life cycle.
II. The malaria parasite needs a vector (mosquito) to spread to other parasite.
III. The female mosquito is not considered parasite, however it needs our blood for reproduction.
IV. In case of brood parasitism, the eggs of parasitic birds (e.g. cuckoo) are not detected and ejected from the nest because of parasite's eggs resemble the hosts eggs in morphology and colour.
V. A population of frogs protected from all predators would increase indefinitely. Show Answer


Q273) The evolutionary reason a given organism interacts with another organism is to Show Answer


Q274) Which of the following is not a form of mutualism? Show Answer


Q275) Plants that produce fruits are part of a _________ mutualism. Show Answer


Q276) Parasitism is an example of a ______ interaction. Show Answer


Q277) Pathogens are classified as Show Answer


Q278) The evolution of the animal immune system was probably driven by Show Answer


Q279) Which of the following statements about competition is false? Show Answer


Q280) When two similar species live in the same area, they may evolve to become more different in order to Show Answer


Q281) Do humans exhibit any mutualistic relationships? Show Answer


Q282) Human cells contain mitochondria, which are responsible for producing the energy needed by our cells. Remember that the ancestors of mitochondria may once have been free-living prokaryotes. If mitochondria were still considered to be separate organisms within our cells, which of the following would best describe our relationship with them? Show Answer


Q283) Cowbirds lay their eggs in the nests of smaller birds. The fast-developing cowbird chicks hatch first, then push the other baby chicks out of the nest as they hatch. The cowbird is classified as a Show Answer


Q284) Pollinator mutualism are special interactions involving ______, which receive food or a place to lay eggs, and ______, which receive pollen from others of their kind. Show Answer


Q285) Consumers can alter which of the following characteristics of victims? Show Answer


Q286) The level of competition between species depends on Show Answer


Q287) Interactions among organisms can have effects at which of the following levels? Show Answer


Q288) In lichens, fungus and blue-green algae live together without causing significant harm to one another. Attempts to grow either the algae or the fungi independently result in the death of the organism. This interaction is an example of Show Answer


Q289) If a new predator is introduced to an area with a type of prey that is limited in number, the prey species is likely to Show Answer


Q290) Human interference has caused ecological imbalances by Show Answer


Q291) Mutualistic relationships Show Answer


Q292) Which of the following statements is true?
I. Many secondary compounds are produced by plants for the purpose of discouraging herbivores (Grazers and Browsers).
II. Predators generally are high on lethality and low on intimacy.
III. Predators in nature are prudent because they do not exploit their prey.
IV. Parasites are low on lethality and high on intimacy. Show Answer


Q293) Which one is a physiological adaptation to cold climate?
I. Small body.
II. Accumulating glycerol and anti freezing proteins.
III. Accumulating ice nucleating protein.
IV. Hibernation. Show Answer


Q294) Which of the following is not a way a parasite can spend its life? Show Answer


Q295) Predators are important for a natural ecosystems because they -
I. Keep prey population under control.
II. Helps in maintaining species diversity.
III. Are used in biological control method.
IV. They reduced intensity of competition among completing prey species. Show Answer


Q296) I. Some species of insects and frogs are cryptically-coloured (Camouflaged).
II. Some animals are poisonous.
III. Some animals (e.g. monarch butterfly) are distasteful due to having chemical in their bodies.
The above adaptations are against Show Answer


Q297) The population explosion that occurred shortly after the prickly pear cactus (opuntia) introduced to Australia in early 1920's is an example of Show Answer


Q298) What percentage of all insects is known to be phytophagous? Show Answer


Q299) For the defence against predators, butterflies become highly distasteful due to having certain chemical in their bodies. What is the source of the chemical? Show Answer


Q300) Which of the following is not an example of a defence used by plants against herbivores? Show Answer


Q301) Which of the following is the example of biological control? Show Answer


Q302) A secondary compound is not a part of the plants Show Answer


Q303) The prickly pear cactus became unusually abundant after its introduction in Australia, because it Show Answer


Q304) No predator become proficient at acquiring prey because Show Answer


Q305) You never see cattle or goats browsing on weed calotropis. Why? Show Answer


Q306) According to Darwin which of the following is a potent force in organic evolution? Show Answer


Q307) Which of the following is not entirely true fact? Show Answer


Q308) In certain shallow lake of South America, the visiting flamingos and resident fishes compete for _______ as their food. Show Answer


Q309) Two organisms that use the same resources when those sources are in short supply are said to be Show Answer


Q310) What is the type of ecological relationship that can involve either members of the same species or different species and in which both participants are harmed? Show Answer


Q311) Two species of barnacles vie for space in the intertidal zone. The one that remains is Show Answer


Q312) The interaction between smaller barnacle Chthamalus and larger barnacle Balanus in intertidal zone is Show Answer


Q313) Find out the false one? Show Answer


Q314) Connell's elegant field experiments are related to Show Answer


Q315) The American MacArthur observed, in 1985 that 5 species of similar warblers coexist on spruce tree because they Show Answer


Q316) Which ecological unit or relationship is least related to abiotic factors? Show Answer


Q317) The overall role of an organism in its environment is called a(n) _______. Show Answer


Q318) Select the false one Show Answer


Q319) The fitness of one species (measured in terms of its 'r', the intrinsic rate to increase) is significantly lower in the presence of another species. The above phenomenon refers to Show Answer


Q320) When resources are limited, the competitively superior species eventually eliminate the other species. It is relatively Show Answer


Q321) Community its Show Answer


Q322) Population dynamics is related to Show Answer


Q323) In small isolated tribal population Show Answer


Q324) Term homeostasis in an ecosystem refers to Show Answer


Q325) The spread of opuntia was controlled by Show Answer


Q326) A bird introduced from another country became a serious pest due to Show Answer


Q327) At asymptote stage, the population is Show Answer


Q328) Changing population is Show Answer


Q329) Migration in birds is guided in part by Show Answer


Q330) Which of the following was not usually observed by G. F. Gause in his studies on interspecific competition? Show Answer


Q331) Which of the following is correct? Show Answer


Q332) If two sympatric species occupy very similar niche under natural condition, one would expect Show Answer


Q333) Which one of the following populations will show the greatest population increase in the next year, assuming exponential growth? Show Answer


Q334) When does competitive exclusion theory state? Show Answer


Q335) Through resource partitioning Show Answer


Q336) Which of the following is not correct? Show Answer


Q337) Commensalism is the interaction in which one species benefits and the other is neither harmed nor benefited. Which of the following is the example of commenaslim? Show Answer


Q338) A female fig wasp enters the syconium of a fig, pollinates the flowers, and lays eggs in the ovaries of some of the flowers. The young larvae grow up, eat (and kill) some, but not all, of the seeds, and complete their life cycle. The fig is completely dependent on fig wasps to pollinate its flowers, and the fig wasp requires figs to complete its life cycle. The interaction between figs and fig wasps has aspects of Show Answer


Q339) The most spectacular and evolutionarily fascinating examples of mutualism is found in Show Answer


Q340) An example of species - Specific co-evolution is certain plant species and the single species of animal that pollinates the plant. This type beneficial system is the safeguard against Show Answer


Q341) Which of the following plants employs 'sexual deceit' to get pollination done by a species of bee? Show Answer


Q342) An example of species-specific co-evolution is Show Answer


Q343) Resource partitioning includes Show Answer


Q344) If a population grow exponentially doubles in size in 3 years, what is the intrinsic rate of increase (r) of the population Show Answer


Q345) A species whose distribution is restricted to small geographical area due to the presence of a comparatively superior species, expands its distribution when the competing species is experimentally removed. This phenomenon is called Show Answer


Q346) Ecologists say that a niche is like a species ________, while habitat is like its ________. Show Answer


Q347) Consider the following statements A - D each with one or two blanks.
A. Bears go into ___(1)____ during winter to ___(2)___ cold weather.
B. A conical age pyramid with a broad base represents ___(3)___ human population.
C. A wasp pollinating a fig flower is an example of ___(4)____.
D. An area with high levels of species richness is known as ___(5)____.
Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements? Show Answer


Q348) Which graph correctly depicts the rate of respiration of a non-hibernating mammal living in cold climate? Show Answer


Q349) Large Woody Vines are more commonly found in Show Answer


Q350) Which one of the following is categorized as a parasite in true sense? Show Answer


Q351) Natural selection operates at Show Answer


Q352) In an age pyramid, the number of individuals of reproductive age is lesser than prereproductive but higher than post reproductive ones. The population is Show Answer


Q353) Verhulst-Pearl logistic growth pattern is Show Answer


Q354) The interaction is detrimental to both the species, in Show Answer


Q355) The association of Staphylococcus and Penicillium is Show Answer


Q356) The association between clown fish and sea anemone is the same as between Show Answer


Q357) In growth pattern (1 - N/K) is Show Answer


Q358) A population growth becomes asymptote when population density Show Answer


Q359) When the value of 'r' is significantly low as compared to another species, it is better known by Show Answer


Q360) Which of the following is most appropriately defined? Show Answer


Q361) What are "large undisturbed areas where wild life is protected in its natural habitat"? Show Answer


Q362) The growth rate of a population during the exponential phase is ________ and during the maximum stationary phase of growth are ______. Show Answer


Q363) The animals that rely on the heat from environment than metabolism to raise their body temperature are, in strict sense called Show Answer


Q364) A biologist studied the population of rats in barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is Show Answer


Q365) In 2005, for each of the 14 million people present in a country 0.028 were born and 0.008 died during the year. Using exponential equation, the number of people present in 2015 is predicted as Show Answer


Q366) Formation of tropical forests needs mean annual temperature and mean annual precipitation as Show Answer


Q367) If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the growth rate of population? Show Answer


Q368) If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the percent growth or birth rate per individual per hour? Show Answer


Q369) Which one of the following organisms reproduces sexually only once in its life time? Show Answer


Q370) Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to Show Answer


Q371) The success of mammals on earth is largely because Show Answer


Q372) Which one of the following causes population explosion? Show Answer


Q373) Go through the following statements.
A. All birds and mammals are capable of thermoregulation.
B. Majority of animals and nearly all plants cannot maintain a constant internal environment.
C. Shivering is a kind of exercise which produces heat and raises body temperature.
D. Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat.
E. Diapause is a stage of suspended development seen in zooplanktons.
Which of the above statements regarding responses of organisms to abiotic factors is false? Show Answer


Q374) Allen's rule applies to Show Answer


Q375) Which statement explains why two species cannot permanently occupy the same ecological niche? Show Answer


Q376) Breeding place of Flamingo (Hansawar) in India is Show Answer


Q377) Hibernating animals have tissues containing mitochondria with a membrane protein that accelerates electron transport, while blocking the synthesis of ATP. What is the consequence of this? Show Answer


Q378) Crash phase in population growth occurs in Show Answer


Q379) In which of the following interactions both partners are adversely affected? Show Answer


Q380) An association of individuals of different species living in the same habitat and having functional interactions is Show Answer


Q381) The correct sentences in the following is/are Show Answer


Q382) Which of the following is correct? Show Answer


Q383) A population with equal number of birth and death will show Show Answer


Q384) In case of scarcity of food or limitation of habitat, animal population is sure to starve and die. Human escape this disaster by Show Answer


Q385) In a population per capital birth rate is 0.15 and per capital death rate is 0.08 during a unit time period. What is the value of r (intrinsic rate of natural increase) for the given population? Show Answer


Q386) Which of the following is correct with reference to population growth? Show Answer


Q387) Gause's principle of competitive exclusion states that Show Answer


Q388) It is much easier for a small animal to run uphill than for a large animal because Show Answer


Q389) When does the growth rate of population following the logistic model equal zero? The logistic model is given as dN/dt = rN (1 - N/K) Show Answer


Q390) Which of the following is correct for r-selected species? Show Answer


Q391) If '+' sign is assigned to beneficial interaction '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to Show Answer


Q392) The principle of competitive exclusion was stated by Show Answer


Q393) Close resemblance in the appearance of Monarch butterfly and Queen butterfly is an example of Show Answer


Q394) Amongst hydrophytes finely dissected leaves occur in Show Answer


Q395) Place occupied by an organism in relation to environment is Show Answer


Q396) When two related populations occupy geographically or spatially separate areas, they are called Show Answer


Q397) The maximum growth rate occurs in Show Answer


Q398) Interspecific interaction could be Show Answer


Q399) The relationship between the alga Microcystis and the surroundings fauna correspond to Show Answer


Q400) Climate is the Show Answer


Q401) Basic unit of ecological hierarchy is Show Answer


Q402) Population is the total number of Show Answer


Q403) Ecotype is Show Answer


Q404) American lakes visiting flamingoes and resident fishes compete for their common food …A… in the lake resources …B… limiting for competition to occur; in interference competition, the feeding efficiency of one species might be …C… due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant
Choose the correct option for A, B and C Show Answer


Q405) Mass of living matter at a trophic level in an area at any time is called Show Answer


Q406) The term ‘Niche’ was first used by Show Answer


Q407) In the association between two organisms, if one organism is benefitted and the other is not benefitted, this relationship is known as Show Answer


Q408) Ephemerals are xerophytes that are Show Answer


Q409) The size of the clay particle is less than Show Answer


Q410) Major biomes of India includes
I. tropical rainforest
II. Alpine region
III. deciduous forest
IV. Desert
V.Himalayan region
VI.sea coast
Choose the correct combination for given question Show Answer


Q411) Plats which behave as mesophytes in rainy season and as xerophytes in summers are called Show Answer


Q412) A species inhabiting different geographical area is known as Show Answer


Q413) A female fig wasp enters the syconium of a fig, pollinates the flowers and lays eggs in the ovaries of some of the flowers. The young larvae grow up, eat (and kill) some, but not all of the seeds and complete their life cycle.
The fig is completely dependent on fig wasps to pollinate its flowers and the fig wasp requires figs to complete its life cycle
The interaction between figs and fig wasps has aspects of
I.mutualism
II.host-parasite interaction
III.competition
IV.ammensalism
V.protocooperation Select the correct option Show Answer


Q414) Population growth curve in most animals, except humans is Show Answer


Q415) Nosema notabilis is an example for Show Answer


Q416) Populations evolve to maximise their reproductive fitness are also called Show Answer


Q417) Ecologist say that niche is like a species …A…, while habitat is like a …B… there A and B indicate Show Answer


Q418) Temperature is very significant to the living beings because of Show Answer


Q419) Mycorrhiza is a mutualistics association of plants root with fungi. The association occurs in Show Answer


Q420) Autecology is the study of relationship between Show Answer


Q421) Soil has five components. The proportions of different components are Show Answer


Q422) ‘Cryptically-coloured’ (camouflaged) is a technique through which prey can Show Answer


Q423) Competition for light, nutrients and space is most severe between
Show Answer


Q424) Many parasites have evolved to be …A… in such a way that both host and the parasite tend to …B… that is, if the host evolves special mechanisms for rejecting or resisting the parasite, the parasite has to evolve mechanisms to …C… and neutralize them, in order to be successful with the same host species.
Choose the correct option for A, B and C Show Answer


Q425) Which of the following is true regarding exponential growth? Show Answer


Q426) Mycorrhizal represents an intimate mutualistic relationship between Show Answer


Q427) If in a pond there are 20 lotus plants of last year and through reproduction 8 new plants are added. Then the birth rate is Show Answer


Q428) Any species growing …A… growing under unlimited resource conditions can reach enormous population densities in a short time. Darwin showed how even …B… growing animal like elephant could reach enormous numbers in absence of check and that characteristics of organism is called C.
Choose the correct option for A, B or C respectively Show Answer


Q429) July 11th is observed as Show Answer


Q430) Light is Show Answer


Q431) Pedology refers to study of Show Answer


Q432) Submerged hydrophytes show Show Answer


Q433) Under a particular set of selection pressure, organisms evolve towards the most …A… reproductive strategy. Some organisms breed only …B… in lifetime while others breed …C… in life time.
Choose the correct option for A, B and C Show Answer


Q434) Weather is the Show Answer


Q435) Sea plants are an example of Show Answer


Q436) Halophytes are Show Answer


Q437) Adaptation may be Show Answer


Q438) …A… regulators are able to maintain homeostasis by means which ensures constant body temperature, constant osmotic concentration, etc. All …B… and …C…. and is very few lower vertebrate and invertebrate species are indeed capable of such regulation (thermoregulation and osmoregulation)
Evolutionary biologists believe that the ‘success’ of mammals is largely due to their ability to maintain a constant body …D… and thrive whether they live in Antarctica or in the Sahara desert.
Choose the correct option for A, B, C and D Show Answer


Q439) The physiological capacity to produce offsprings is called Show Answer


Q440) How many horizons are present in the soil profile? Show Answer


Q441) In … phase population adopt itself to new environment and starts to increase its number Show Answer


Q442) The association of animals when both partners are benefitted is Show Answer


Q443) Factors which determine to the large extent the vegetation of any area are
I. pH of soil
II. mineral composition of the soil
III.water holding capacity of soil
IV. weather condition Choose the correct option Show Answer


Q444) The most ecologically relevant environmental factor Show Answer


Q445) The closely related morphologically similar sympatric population, but reproductively isolated are designated as Show Answer


Q446) Term ‘ecology’ was given by Show Answer


Q447) Regulators are also called Show Answer


Q448) Diapause is Show Answer


Q449) The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show? Show Answer


Q450) Which of the following is categorised as a parasite in true sense? Show Answer


Q451) Ratio between mortality and natality is called Show Answer


Q452) Behavioural adaptation to environment in desert lizards are
I. Burrowing soil
II. Losing heat during high temperature
III. Active during morning and evening
IV. Insulating body due to thick fatty dermis.
Select the correct pair Show Answer


Q453) Temperature decreases progressively from the Show Answer


Q454) A population growing in a habitat with limited resources shows four phases of growth in the following sequence Show Answer


Q455) Photosynthetically Active Region (PAR) have the electromagnetic region of Show Answer


Q456) Population density is the population per unit Show Answer


Q457) Which of the following is inappropriately defined?
I. Host is an organism which provides only food, shelter to another organism
II. Amensalism is a relationship in which one species is benefitted, whereas the other is unaffected
III. Predator is an organism that catches and kills other organism for food of same species
IV. Parasite is an organism which always lives inside the body of other organism and may kill it .
Select the correct option Show Answer


Q458) Radiation below the visible range are called Show Answer


Q459) Competition of species leads to Show Answer


Q460) Model is Show Answer


Q461) Census is Show Answer


Q462) In bacteria, fungi and lower plants, various of thick-walled …A… are formed, which help them to survive …B… conditions-these germinate on availability of suitable environment. In higher plants …C… and some other vegetative reproductive structures serve as means to tide over periods of stress besides helping in dispersal-they germinate to form new plants under favourable moisture and temperate conditions Choose the correct option for A, B and C Show Answer


Q463) Biotic community is the assemblage of populations of Show Answer


Q464) Ecology is the branch of biology which deals with interaction between Show Answer


Q465) Life history traits of organisms have evolved in relation to the constraints imposed by which components of habitat Show Answer


Q466) I. Salt concentration (parts par thousand) in sea water is …A…
II. Salt concentration (parts per thousand) in hypersaline water is …B…
Choose the correct option for A and B Show Answer


Q467) B-horizon is also called Show Answer


Q468) Plant grows best in the
I.acidic soil
II.basic soil
III.neutral soil
IV.slightly acidic soil
Choose the correct combination Show Answer


Q469) Choose the incorrect statements
Show Answer


Q470) Pollination is an example of Show Answer


Q471) Root cap is not found in Show Answer


Q472) Which model is considered a more realistic one? Show Answer


Q473) Salt concentration (parts par thousand) is less than 5% in Show Answer


Q474) An interaction favourable to both population, but no obligatory to either is Show Answer


Q475) Phenomenal and rapid increase of population in a short period is called Show Answer


Q476) Life on earth originated in Show Answer


Q477) The soil with poorest water holding capacity is Show Answer


Q478) Differentiation of various tissue and organs in response to light is called Show Answer


Q479) In a population, unrestricted reproductive capacity is called Show Answer


Q480) Leve of competition between species depends on
I. availability of resources
II.population density
III. group interaction of organis
Choose the correct combination Show Answer


Q481) Concept of mimicry was given by …A… Father of Indian Plant Ecology …B… Term ‘ecology’ coined by …C…
Here A, B and C refers to Show Answer


Q482) Partial regulators are the organism which Show Answer


Q483) A population growing in a habitat with …A… resources show initially a …B… phase, followed by phase of acceleration and deceleration and finally an asymptote, when the population density reaches the …C… .
Choose the correct option for A, B and C Show Answer


Q484) Altitude sickness is Show Answer


Q485) Plants grown on sandy soil, are grouped under Show Answer


Q486) Ecology is basically concerned with how many levels? Show Answer


Q487) An unrestricted reproductive capacity is called Show Answer


Q488) Asymptote stage of the population is the stage of population in which the population is Show Answer


Q489) Conformers are inactive in adverse conditions due to Show Answer


Q490) A secondary compound are the part of the plants Show Answer


Q491) Age structure of a population influences population growth because Show Answer


Q492) Choose the wrong statements.
I. Two species may not live in same habitat
II. The more dissimilar the niches of two species the stronger is their competition
III. Two species can occupy the same niche in geographical area
IV. No two species may occupy the same ecosystem
The correct option is Show Answer


Q493) For better survival of the human population, which of the following steps is most important? Show Answer


Q494) Photosynthetic yield is maximum at the Show Answer


Q495) No population of any species in nature has its disposal …A… resources to permit exponential growth. This leads to competition between individuals for …B… resources. Eventually, the …C… individual will survive and reproduce.
Choose the correct option for A, B and C Show Answer


Q496) Schimper’s second low related to Show Answer


Q497) Which of the following statements regarding species interdependence are true?
I. An Association of two species where one is benefitted and other remains unaffected is called mutualism.
II. An interspecific association where both partners derive benefit from each other is called commensalism.
III. A direct food relation between two species of animals in which one animal kills and feeds on another is referred as predation.
IV. A relationship between two species of organisms where both are partners are benefitted from each other is called symbiosis. Show Answer


Q498) In a population, the condition at which the rate of addition of new members is more than the rate of individuals lost indicates Show Answer


Q499) In the absence of an external source of water, Kangaroo rat in North American desert is capable of meeting all its water requirements through Show Answer


Q500) Even a plant species, which makes its own food, cannot survive alone; it needs soil microbes to breakdown the …A… matter in soil and return the …B…. nutrients for absorption. And then, how will the plant manage pollination without an animal agent? It is obvious that in nature, animals, plants and microbes cannot live in …C… but interact in various ways to form a biological community.
Choose the correct option for A, B and C Show Answer


Q501) The growth of a population without limit at its maximal rate and also that, rates of immigration and emigration are equal, then it is called Show Answer


Q502) Which of the following characters explain the bell-shaped curve? Show Answer


Q503) In which regions of the world are hot deserts located? Show Answer


Q504) Population density of a population in a given habitat during a given period fluctuates due to change in Show Answer


Q505) Statements
I. Recent studies support competition as suggested in ‘Gauses’s Competitive Exclusion Principle’
II. Gause’s hypothesis says if two species compete for same resources then one will be eliminated by another species.
III. More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion.
IV. Gause’s competitive exclusion principle is effective when resources are in excess.
V. Unlimited resources give better opportunity for adaptation.
Choose the correct combination of statements
Show Answer


Q506) Different organism are adapted to their environment in terms of not only survival but also reproduction.
This statement belongs to Show Answer


Q507) Which determines the flora and fauna of a place? Show Answer


Q508) Eurythermals are the organism which Show Answer


Q509) Plants growing on sand and gravel are called Show Answer


Q510) In aquatic environment the types of benthic animals are determined by Show Answer


Q511) The growth rate of a population stabilizes after Show Answer


Q512) Why exotic species become invasive sometime and starts spreading fast because of Show Answer


Q513) In commensalism Show Answer


Q514) There are two optional ways of exploitation. One way is parasitism. Which is the other one? Show Answer


Q515) Population size of Siberian cranes at Bharatpur wetlands in any year is Show Answer


Q516) Prickly pear cactus species introduced into Australia in Show Answer


Q517) Pattern of population results in a J-shaped curve obtained in Show Answer


Q518) If non-limiting conditions are provided then what will happen? Show Answer


Q519) In which one of the following habitats does the diurnal temperature of soil surface vary most? Show Answer


Q520) Character displacement take place when there is Show Answer


Q521) Gloger’s rule related to the Show Answer


Q522) Positive growth or rapid increase in the population is indicated by Show Answer


Q523) The soil which is transported by wind is known as Show Answer


Q524) When there are large number of post-reproductive or older individuals and lesser number of pre- reproductive individuals then that population is Show Answer


Q525) Human liverfluke (a trematode parasite) depends on which two intermediate hosts.
I. Snail
II. Fish
III. Pig
IV. Mosquito
Choose the correct combination Show Answer


Q526) Prickly pear cactus (an exotic species) can brought under control (in Australia) by using Show Answer


Q527) Which of the following is correct range of latitudes for temperate region? Show Answer


Q528) Population is Show Answer


Q529) Ecological hierarchy comprises, which of the following sequence Show Answer


Q530) In India, human population is heavily weighed towards the younger age group as a result of Show Answer


Q531) Aerenchyma is the characteristics feature of Show Answer


Q532) Predator helps to create checks on Show Answer


Q533) Animals eating plants are categorised separately as …A…, they are in a broad ecological context, not very different from …B…Choose the correct option A and B Show Answer


Q534) The niche of a population is defined as Show Answer


Q535) Geometric representation of age structure is characteristic of Show Answer


Q536) When Darwin spoke of the struggle for existence and survival of the fittest in the nature, he was conveinced that Show Answer


Q537) Genetic drift operates in Show Answer


Q538) Which of the following is not true for a species? Show Answer


Q539) Zero growth means Show Answer


Q540) Ecological age groups of a population are
I. pre-reproductive
II. reproductive
III. post-reproductive
IV. old-age group
V. adolescent age group
VI. infertile age group
Choose the correct option for given statements Show Answer


Q541) Sigmoid growth curve is represented by Show Answer


Q542) In which one of the following pairs is the specific characteristic of soil not correctly matched? Show Answer


Q543) All aquatic vertebrates and most molluscs and cry fishes are Show Answer


Q544) Average temperature of thermal springs and deep sea hydrothermal vents exceeds Show Answer


Q545) In the oceans, the environment is perpetually dark at Show Answer


Q546) Regulators are the their animals which Show Answer


Q547) Population A-Have the intrinsic rate of natural increase is 0.2 Population B-Have the intrinsic rate of natural increase is 0.3 Population C-Have the intrinsic rate of natural increase is 0.4 Population D-Have the intrinsic rate of natural increase is 0.5
Which population will increase fastest among all of the given population? Show Answer


Q548) Ecosystem components includes Show Answer


Q549) Monarch butterflies are highly distasteful to predator due to Show Answer


Q550) Species living in a restricted geographical area is Show Answer


Q551) Pneumatophores have lenticels for Show Answer


Q552) Temperature gradient over earth surface is Show Answer


Q553) Abiotic factors affects the
I. Structure of organisms
II. Physiology of organisms
III.Behaviour of organisms
Show Answer


Q554) Which one of the following is a matching pair of certain organism(s) and the kind of association? Show Answer


Q555) Nature and properties of soil in different places vary due to Show Answer


Q556) Zero growth of population is indicated by Show Answer


Q557) Why mammals of the colder region generally have shorter ears and limbs?
I. To minimize their surface volume ratio
II. To minimize heat loss
III. To maximize their surface volume ratio
IV. To maximize heat loss
Choose the correct combination from the given option Show Answer


Q558) The productivity and distribution of plants mainly depends on Show Answer


Q559) Which one is the edaphic factor in biosphere? Show Answer


Q560) Population density of terrestrial organisms is measured in terms of individuals per Show Answer


Q561) Two opposite forces operate in the growth and development of every population, one of them relates to the ability to reproduce at a given rate. The force opposing is called Show Answer


Q562) Which one is the example of sexual parasite? Show Answer


Q563) An overwhelming majority …A… of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature …B… with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids …C… with that of the ambient water osmotic concentration. These animals and plants are simply conformers.
Choose the correct option for A , B and C Show Answer


Q564) Good soil is that which Show Answer


Q565) Living in same habitat, organisms of same species of form Show Answer


Q566) Which of the following factors increase, the size of a population? Show Answer


Q567) Population size is more technically called Show Answer


Q568) How seals can survive in polar climate where the temperature prevails below 0℃? Show Answer


Q569) Identify the basic levels of ecology
I. Organisms
II. Populations
III. Communities
IV. Biomes
V. Human
VI. Vertebrates
Choose the correct option Show Answer


Q570) What is true about the isolated small tribal populations? Show Answer


Q571) Reproductive isolation between segments of a single population is termed as Show Answer


Q572) Humus is formed by Show Answer


Q573) An indirect competition for shared resources such as a particular nutrient is called Show Answer


Q574) Population size more technically called …A… (designated as N) need not necessarily to be measured in …B… only
Choose the correct option for A and B Show Answer


Q575) Certain characteristic demographic features of developing countries are Show Answer


Q576) The permanent decrease in population number occurs due to Show Answer


Q577) Exotic species are also called
I. introduced species
II. alien species
III. non-indigenous species
IV. non-native species
Choose the correct combination
Show Answer


Q578) Keystone species deserve protection because these Show Answer


Q579) There is more competition for survival between Show Answer


Q580) Find odd one out, according to parasitism. Show Answer


Q581) They are dominant plants of the cold desert Show Answer


Q582) Study of environmental and animal relation is Show Answer


Q583) Sunlight is available as a source of energy. The sunlight is very much important in Show Answer


Q584) Which of the following is correct
I. In a population, birth rate and death rate refer to per capita births and death respectively
II. In nature, we rarely find isolated single individuals of any species
III. The size of population for any species is stable phenomena
IV. Ecological effects of any factors on a population growth are generally reflected in its size/population density
Show Answer


Q585) Which one is incorrect regarding parasitism? Show Answer


Q586) The interaction of species with the environment is called as Show Answer


Q587) Diapause is stage of suspended development in lakes and ponds. Find out the season in which it occurs Show Answer


Q588) Examples of chemicals produced by plants as a defense against grazers and browsers
I. Nicotine
II. Caffeine
III. Quinine
IV. Strychnine
V. Opium
Choose the correct combination Show Answer


Q589) Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called Show Answer


Q590) Pseudo copulation occurs in Show Answer


Q591) The age of pyramid with broad base indicates Show Answer


Q592) A high density of tiger population in an area can result in Show Answer


Q593) Which horizon in soil profile is known as top soil? Show Answer


Q594) Plants developing in dry condition are Show Answer


Q595) Natality refers to the number of Show Answer


Q596) I. Species level
II. Population level
III. Individual level
IV. Community level
Out of the levels given at a which level selection operates Show Answer


Q597) Association of animals belonging to different species, where both partners are benefitted, is called Show Answer


Q598) Why no predator become proficient in acquiring prey? Show Answer


Q599) Hierarchy is Show Answer


Q600) The percentage of soil volume occupied by pore space is called porosity of soil. It is minimum in Show Answer


Q601) The inherent maximum capacity of an organism to reproduce or increase in number is called as Show Answer


Q602) Body compensates low oxygen availability at high altitudes by
I. increasing RBC
II. decreasing binding affinity of haemoglobin
III. increasing binding affinity of haemoglobin
IV. increasing breathing rate
V. decreasing breathing rate
Choose the correct option for given statement Show Answer


Q603) The species of plants that play a vital role in controlling the relative abundance of other species in a community are called Show Answer


Q604) If birth rate is 100, death rate is 10 and number of individuals in population group is 1000, then what will be the percentage of natural growth rate? Show Answer


Q605) In most animals, the metabolic reactions proceed in a …A… temperature range (in humans, it is 37℃). But there are microbes (archaebacteria) that flourish in hot springs and deep sea hydrothermal vents where temperature far exceed …B…Choose the correct option for A and B Show Answer


Q606) How many types of age pyramid are there? Show Answer


Q607) Competition occurs when Show Answer


Q608) I. Some species of insects and frogs are critically coloured (camouflaged)
II. Some animals are poisonous
III. Monarch butterfly are distasteful
The above adaptations are against Show Answer


Q609) Humus layer in soil composed of dead fresh organic matter called Show Answer


Q610) I. Biochemical adaptation are seen in organisms living in great depth of the ocean to face crushing pressure
II. Allen’s rule is explain mammals living in colder climates
III. Altitude sickness is caused because of body not getting enough oxygen due to low atmospheric pressure at high altitude
IV. Desert lizards lack behavioural means to manage to their body temperature.
Choose the correct option for above adaptations Show Answer


Q611) Lichens represents an intimate mutualistic relationship between Show Answer


Q612) The science dealing with soil is Show Answer


Q613) Biological control methods adopted in agriculture pest control are based on the Show Answer


Q614) Viscum album grows on trees. This is an example of Show Answer


Q615) Trichonympha campanular is the example of Show Answer


Q616) ‘Two closely related species competing for same resources cannot co-exist indefinately’. This law is also called Show Answer


Q617) Chi-square test is Show Answer


Q618) Which one of the following expressions is associated with a ‘mangrove plant’? Show Answer


Q619) Epiphyte is an example of Show Answer


Q620) Barnacles growing on the back of whale is an example for Show Answer


Q621) How much percentage of animals on this earth are regulators? Show Answer


Q622) Plants of aquatic habitat is called Show Answer


Q623) Which of the following is an example of a defence used by plants against herbivores?
I. Production of caffeine, tannin quinine
II. More production of non-woody tissues
III. Productions of hairs, thorns, spines
IV. Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair Show Answer


Q624) Which type of age pyramid obtained when the population is growing? Show Answer


Q625) The formula of growth rate for population in a given time is Show Answer


Q626) Genetically adapted population to a particular habitat is called Show Answer


Q627) Conformers are also called Show Answer


Q628) Hydrophytes are characterised by Show Answer


Q629) Interspecific interactions arise from the interaction of Show Answer


Q630) Gause’s law is true only when Show Answer


Q631) If natality rate is parallel to mortality rate then population Show Answer


Q632) Sex ratio is the Show Answer


Q633) Statements
I. Mutualistic relationship evolve when benefit of both species out weight the lost
II. Mutualism relationship evolve when benefits of both species under weight the lost
III. Human caused ecological balance by eradicating common parasite
IV. Human caused altering competition between species Select the wrong pair from statements Show Answer


Q634) Biotic potential or potential natality means Show Answer


Q635) Formation of wide variety of habitats takes place by Show Answer


Q636) Population of any species is Show Answer


Q637) Smallest unit of ecology is Show Answer


Q638) What is a keystone species? Show Answer


Q639) Find out the correct ones
I. Mammals of colder climate generally have shorter ears and limbs to minimize heat loss
II. All organisms have behavioural adaptations that allow them to respond quickly to a stressful situation
III. Some organisms possess behavioural adaptations which allow them migrating temporarily to a less stressful situation
IV. Invertebrates and fishes live at great depths in the ocean have biochemical adaptation to cope with high pressure Show Answer


Q640) At high altitude we feels the sickness. The reason for sickness may be due to Show Answer


Q641) What is probiosis? Show Answer


Q642) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this
I. Lots of urea and phosphate fertilizers were used in the crops in the vicinity.
II. The area was sprayed with DDT by an aircraft.
III. The lake water turned green and stinky.
IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Which two of the above were the main causes of fish mortality in the lake? Show Answer


Q643) Logistic growth is represented by which equation Show Answer


Q644) Desert lizards lack the …A… ability that mammals have to deal with the …B… temperatures of their habitat, but manage to keep their body temperature fairly constant by …C… means.
Choose the correct option for A, B and C Show Answer


Q645) Plants growing in dry and saline soil are called Show Answer


Q646) Adaptation of parasite may be
I. loss of unnecessary organs
II. presence of adhesive organs
III. origin of suckers to cling to host
IV. loss of digestive system
V. high reproductive capacity
Choose the correct combination
Show Answer


Q647) Exponential growth in plants can be expressed as Show Answer


Q648) Homeostasis is Show Answer


Q649) Ecology at the organism level is also called Show Answer


Q650) Synecology is the study of relationship between Show Answer


Q651) Starfish pisaster is the important predator in intertidal communities of Show Answer


Q652) Under normal condition …A… and ….B… are the most important factors influencing populations density …C… and …D… assuming importance only under special condition.
Choose the correct option for A, B and C Show Answer


Q653) If the strong partner is benefitted and the weak partner is damaged. It is known as Show Answer


Q654) Who stated that human population grows geometrically? Show Answer


Q655) Attribute of the organisms (morphological, physiological and behavioural) that enables organism to survive and reproduce in its habitat is called Show Answer


Q656) Altitude sickness occurs at high Mountains. This sickness have symptoms like Show Answer


Q657) Heat loss or heat gain is a function of surface area. Since small animals have a …A… relative to their volume, they tend to lose body heat very fast, when it is cold outside; then they have to expend …B… to generate body heat through metabolism. This is the main reason why very small animals are …C… found in polar regions.
Choose the correct options for A, B and C Show Answer


Q658) You never see any cattle or goat browsing on Calotropis due to Show Answer


Q659) The desert plants in order to tolerate water stress, show Show Answer


Q660) The type of population, where pre-reproductive animals occur in large numbers, is Show Answer


Q661) Which characteristics determine the percolation and water holding capacity of soils? Show Answer


Q662) During the course of million of years of their existence most species should have evolved a relatively …A… internal environment (within the body of organisms). This internal environment would permit all biochemical reactions and physiological functions to proceed with …B… efficiency and therefore, increase the overall fitness of the species The ability of an organism to keep the internal environment constant despite drastic changes in external conditions is called …C…
Choose the correct option for A, B and C Show Answer


Q663) To avoid the competive exclusion principle two similar species live in same area, they may evolve to become more different in order to Show Answer


Q664) Choose the wrong statement Show Answer


Q665) Which of the following supports a dense population of plankton and littoral vegetation? Show Answer


Q666) Reproductive value of an individual is greatest just before Show Answer


Q667) In an area there are 200 Parthenium and is single banyan tree. Which of the conculsion (s) is/are correct?
I. Population density of banyan is low
II. Population cover area of banyan is high
III. In above cases the percentage of cover of biomass is more meaningful than population size Show Answer


Q668) Populations termed r-strategists Show Answer


Q669) If the mean and the madian pertaining to a certain character of a population are of the same value, the following is most likely to occur Show Answer


Q670) Environment factor (s) that characterize the habitat of ecosystem is/are Show Answer


Q671) Two species occupying same or overlapping area are called as Show Answer


Q672) UV radiation and IR radiation have the range of Show Answer


Q673) Predation is Show Answer


Q674) The organisms inhabiting a common environment belong to the same Show Answer


Q675) NEERI is Show Answer


Q676) Formation of major biomes such as desert, rainforest takes place by Show Answer