Practice Test

Q1) The formula for exponential population growth is: Show Answer

Q2) A population can grow exponentially? Show Answer

Q3) Which of the following does not directly affect biotic potential? Show Answer

Q4) When natality is balanced by mortality. There will be: Show Answer

Q5) Sum total of all the genetic information in the breeding members of a population at a time is known as: Show Answer

Q6) A community of similar individuals living a circumscribed area at a given time and capable of interbreeding is called: Show Answer

Q7) There is more competition for survival between: Show Answer

Q8) A high density of elephant population in an area can result in: Show Answer

Q9) Loss of pigmentation, slender body and reduced apendages, absence of visual organs are adaptations in: Show Answer

Q10) Plants and animals living in a given area constitute: Show Answer

Q11) Carrying capacity of an environment is determined by: Show Answer

Q12) Parameter for describing a population is: Show Answer

Q13) What constitutes the most important boundary between different species? Show Answer

Q14) Population density is expressed by: Show Answer

Q15) Fingers and legs are shorter in colder regions. It is: Show Answer

Q16) Population whose members reproduce asexually are termed: Show Answer

Q17) Population whose members reproduce sexually are termed: Show Answer

Q18) 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

Q19) All the living organisms on earth constitute: Show Answer

Q20) Individuals of the same species in a particular locality constitute: Show Answer

Q21) Migration refers to: Show Answer

Q22) Gametophyte and sporophyte stages of a fern plant should ecologically be considered as: Show Answer

Q23) Competition is most severe in two: Show Answer

Q24) Which of the following shows the polymorphism? Show Answer

Q25) Cross-fertilization in plants is a kind of: Show Answer

Q26) An interaction between two or more organisms when the resource necessary for them are limited, refers to: Show Answer

Q27) Sub-groups of a population capable of interbreeding are called as: Show Answer

Q28) The carrying capacity is determined by its: Show Answer

Q29) A population can grow exponentially: Show Answer

Q30) Which of the following does not directly affect biotic potential? Show Answer

Q31) Term species in ecology refers to: Show Answer

Q32) The levelling of an S-shaped curve describing population growth is caused by: Show Answer

Q33) The abundance of a species population within its habitat is called: Show Answer

Q34) Mule is produced by breeding: Show Answer

Q35) When population reaches carrying capacity: Show Answer

Q36) Crow also incubates the eggs of: Show Answer

Q37) Population density of aquatic organisms is expressed in terms of individuals per: Show Answer

Q38) Which of the following factors is not determinant of population size? Show Answer

Q39) The dominant individual in a herd is: Show Answer

Q40) Which of these helps in the survival of a species? Show Answer

Q41) Emigration affects population in: Show Answer

Q42) The members or a form of polymorphic species: Show Answer

Q43) The aggregate of processes that determine the size and composition of any population is termed as: Show Answer

Q44) 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

Q45) The factor which does not affect the population size is: Show Answer

Q46) Rapid decline in a population due to high mortality rate is: Show Answer

Q47) Which of the following chemical compound helps in transmitting the message to other members of the same species? Show Answer

Q48) The population tends to increase as individuals are added by: Show Answer

Q49) The population tends to decrease by: Show Answer

Q50) The most distinct and easily observation unit is: Show Answer

Q51) Human society is a product of: Show Answer

Q52) Which of the following morphological forms is also known as ecophenes? Show Answer

Q53) The relationship between one species and another within a community that has evolved through interactions is based upon: Show Answer

Q54) According to the species equilibrium theory, smaller island have fewer species because they have: Show Answer

Q55) Competition between individuals of the species is called: Show Answer

Q56) Which of the following levels of organisation emphasizes the structural aspects in terms of relation and requirement of organisms? Show Answer

Q57) Synecology is study of: Show Answer

Q58) Halophytes growing on mud are called as: Show Answer

Q59) Euhalophytes grow where the concentration of NaCI ranges: Show Answer

Q60) Members of biological species are potentially able to: Show Answer

Q61) Which of the following niches is concerned with the trophic position of an organism? Show Answer

Q62) The keystone species in an ecosystem are those which: Show Answer

Q63) The sphere of living matter together with water, air and soil on the earth is called: Show Answer

Q64) Plants with irreversible and genetically fixed adaptations are known as: Show Answer

Q65) Species which has a restricted distribution is called: Show Answer

Q66) Study of communities, especially their environmental relationship and structure, is known as: Show Answer

Q67) 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

Q68) The part of earth and atmosphere supporting life is: Show Answer

Q69) Number of immigration is more than emigration and death is lower than natality. Growth curve of population will show: Show Answer

Q70) Percentage ratio of natality over mortality is: Show Answer

Q71) Human population shows: Show Answer

Q72) 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

Q73) Adaptation of a species is its: Show Answer

Q74) Asymptote is a stage when a population is: Show Answer

Q75) Two species cannot occupy the same niche. This law is known as: Show Answer

Q76) Broad-leaved forest oak are found in: Show Answer

Q77) Prolonged liberal irrigation of agricultural field likely to create the problem of: Show Answer

Q78) There exists a close association between the alga and the fungus within a lichen. The fungus: Show Answer

Q79) Identify the correctly matched pair: Show Answer

Q80) Sunderban contains mainly: Show Answer

Q81) Pneumatophores are present/common in: Show Answer

Q82) Which one of the following correctly represents an organism and its ecological niche? Show Answer

Q83) Humidity in atmosphere decreases rate of: Show Answer

Q84) Niche overlap indicates: Show Answer

Q85) Annual migration does not occur in the case of: Show Answer

Q86) Geometric representation of age structure is a characteristic of: Show Answer

Q87) Which one of the following is categorised as a parasite in true sense? Show Answer

Q88) 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

Q89) The ecological levels of organisation in terms of complexity are arranged in the order: Show Answer

Q90) The role of an organism in the ecological system is known as: Show Answer

Q91) The kangaroo rat and camel adapt to dry and hot conditions in the deserts by: Show Answer

Q92) Adaptation to low temperature and freezing in animals occurs due to the production of: Show Answer

Q93) Which of the following are important components of environment? Show Answer

Q94) Who is regareded as father of ecology in India: Show Answer

Q95) The word ecology was given by: Show Answer

Q96) Which of the following is correct order of biological organisation ranging from organism to biosphere? Show Answer

Q97) The basic unit of study in ecology is/are: Show Answer

Q98) What is landscape? Show Answer

Q99) On the basis of variation in mean temperature along latitude, the temperate climatic region is at: Show Answer

Q100) Ecological niche of an organism represents: Show Answer

Q101) Temperature decreases with increasing height in troposphere upto: Show Answer

Q102) 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

Q103) The limnetic zone is: Show Answer

Q104) Which of the following is an example of physiological xerophyte? Show Answer

Q105) Biotic potential is counteracted by: Show Answer

Q106) Physical space occupied by an organism (and also its functional role in a community) is called: Show Answer

Q107) Floating hydrophytes are characterized by:
(a) well developed aerenchyma
(b) absence of stomata on the lower side of leaf
(c) lamina system poorly developed
(d) sunken stomata
(e) root system poorly developed.
The correct characters are: Show Answer

Q108) Xerophytes are characterized by:
(a) well developed cuticle
(b)well developed root system
(c)deciduous leaves with assimilatory stems
(d) sunken stomata.
The correct characters are: Show Answer

Q109) Animals which can tolerate only a narrow range of salinity are said to be: Show Answer

Q110) The ecological niche of an organism denotes: Show Answer

Q111) In a population where competition between individuals is severe, then the distribution is said to be: Show Answer

Q112) Information of birth rate, death rate, sex ratio, age distribution of population can be got from: Show Answer

Q113) Which of the following is biotic factor? Show Answer

Q114) Maximum growth rate occurs in: Show Answer

Q115) The formula for exponential population growth is: Show Answer

Q116) Which of the following is correct: Show Answer

Q117) A set of local populations connected by dispersing individuals is called: Show Answer

Q118) The increase in number of individuals in a population under given environmental condition is called: Show Answer

Q119) The J-shaped growth form is represented by which of the following exponential equation: Show Answer

Q120) The S-shaped sigmoid growth form is represented by which of the following equation, which includes an expression for environmental resistance: Show Answer

Q121) Which of the following statement is true about ecological relationship? Show Answer

Q122) Ecological niche is: Show Answer

Q123) Ecology is basically concerned with four levels of biology organizations. These levels are Show Answer

Q124) Which of the following accounts for the formation of major biomes? Show Answer

Q125) A regional ecological unit having a specific climate is Show Answer

Q126) Major biomes of India include Show Answer

Q127) What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats? Show Answer

Q128) False statement is Show Answer

Q129) Select the false statement Show Answer

Q130) 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

Q131) Snow leopards are not found in Kerala forests. Which factor is responsible for it? Show Answer

Q132) Next to temperature, which is the most important factor influencing the life of organisms? Show Answer

Q133) Life Show Answer

Q134) Each of the following is an important factor in determining the productivity of fresh water lake except Show Answer

Q135) Which of the following is not a part of an organisms physical environment? Show Answer

Q136) Which of the following statements is false? Show Answer

Q137) 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

Q138) Which of the following might contribute to determining an organisms habitat? Show Answer

Q139) The location of terrestrial biomes is strongly influenced by Show Answer

Q140) The two sides of a given mountain have the same latitude and altitude. Are they likely to have the same climate? Show Answer

Q141) Seasons are influenced by Show Answer

Q142) 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

Q143) The ultimate source of energy for all ecosystems on earth is Show Answer

Q144) Animals having a built-in thermostat to maintain constant body temperature are Show Answer

Q145) 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

Q146) Deep (> 500 m) in the oceans inhabitants are not aware of existence of a celestial source of energy called Show Answer

Q147) The nature of soil in a given area is independent of Show Answer

Q148) Find out the false one Show Answer

Q149) Percolation and water holding capacity of soil is dependent upon Show Answer

Q150) To a large extent, the vegetation of an area is determined by Show Answer

Q151) Which of the factors dictates the types of animals in a habitat Show Answer

Q152) Which of the following factors often determine the type of benthic animals that thrive in aquatic environment? Show Answer

Q153) Which of the following term implies the maintenance of relatively constant physical and chemical conditions within organisms? Show Answer

Q154) Human can maintain homeostasis through Show Answer

Q155) Which of the following statement is false? Show Answer

Q156) 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

Q157) Why small animals are mostly not found in polar areas? Show Answer

Q158) 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

Q159) 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

Q160) Whales, the world's largest living mammals, live in the ocean, but there are no very small aquatic mammals why? Show Answer

Q161) Kangaroo rats Show Answer

Q162) Which of the following is an important adaptation of animals to cold climate Show Answer

Q163) Elephants use their ears to dump heat to the environment. What mechanisms might they employ to increase heat loss from ears? Show Answer

Q164) Find out the false one Show Answer

Q165) 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

Q166) Choose the odd one w.r.t. adaptations in the organisms Show Answer

Q167) Symptoms of altitude sickness include all except Show Answer

Q168) Acclimatization (compensatory mechanisms) to altitude sickness includes all except Show Answer

Q169) Organisms have evolved various mechanisms to maintain homeostasis to perform its physiological and biochemical functions. This can be obtained through Show Answer

Q170) Keoladeo National Park (Bharatpur) hosts thousands of migrating birds from Siberia and other extremely cold northern regions. This park is located in Show Answer

Q171) Adaptation is an attribute of organisms that enables them to survive and reproduce in their habitats. Adaptation Show Answer

Q172) The Kangaroo rat in North American desert do not drink water. How does it survive in such xeric condition Show Answer

Q173) Which of the following statement is false w.r.t. adaptations? Show Answer

Q174) Which of the following is false? Show Answer

Q175) 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

Q176) 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

Q177) Population density of terrestrial organism is measured in terms of per Show Answer

Q178) Population density of aquatic animals in some waterbody is measured in term of per Show Answer

Q179) Density of a population (D) is Show Answer

Q180) Total number of individual of a specific in an area is called Show Answer

Q181) In an area, there are 200 Parthenium and a single huge banyan tree. Which of the following conclusions is correct Show Answer

Q182) 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

Q183) The age distribution of a population is determined by Show Answer

Q184) Parameters related to age structure include Show Answer

Q185) The age structure of a population is its Show Answer

Q186) The reproductive value of an individual is greatest Show Answer

Q187) If most individuals in a population are young, why is the population likely to grow rapidly in the future? Show Answer

Q188) What four factors define population growth? Show Answer

Q189) Size of population can be decreased by Show Answer

Q190) Which of the following is not a factor that would limit the growth of a population? Show Answer

Q191) A population of 100 individuals has a doubling time of 25 years. What size will this population be in 100 years? Show Answer

Q192) Which of the following statements is correct? Show Answer

Q193) Allen's rule is related to Show Answer

Q194) For which of the following cases, population density can be easily determined by utilizing non-biological parameter? Show Answer

Q195) Population growth of a species is not related to which of the following parameters? Show Answer

Q196) Which of the following can be a limit on population growth? Show Answer

Q197) 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

Q198) Exponential growth occurs when there is Show Answer

Q199) Logistic growth occurs when there is Show Answer

Q200) 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

Q201) Organisms with very high intrinsic growth rates have Show Answer

Q202) A population with a larger proportion of older individuals than younger ones will likely Show Answer

Q203) What is the fate of a population that is dominated by younger individuals and lacking older individuals? Show Answer

Q204) Biotic potential refers to Show Answer

Q205) Periodic departure and return is known as Show Answer

Q206) An "Urn" shaped population age pyramid represents Show Answer

Q207) A behavioural strategy of adaptation is called echolocation is found in Show Answer

Q208) Which is not related to S-shaped population curve? Show Answer

Q209) Which of the following is correct? Show Answer

Q210) 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

Q211) Which of these is an explanation of why a population can fluctuate once it has reached carrying capacity? Show Answer

Q212) Which is not an assumption for logistic growth? Show Answer

Q213) If B = 0.55, D = 0.45 and N = 1000, then dN/dt = ______ . Show Answer

Q214) Choose the correct option Show Answer

Q215) Which of the following is true concerning exponential growth? Show Answer

Q216) The population growth equation describes a population that Show Answer

Q217) The growth rate of a population in an unlimited environment Show Answer

Q218) Which of the following is not an assumption of the logistic model for population growth? Show Answer

Q219) Which of the following is true for the carrying capacity (K)? Show Answer

Q220) 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

Q221) A broad-based, pyramid shaped age structure is characteristic of a population that is Show Answer

Q222) A population grows rapidly at first and then levels off at carrying capacity of it is Show Answer

Q223) 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

Q224) A country that has a stable population is characterized by an age structure that is _______. Show Answer

Q225) 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

Q226) Which one is true? Show Answer

Q227) Which one of the following is incorrect? Show Answer

Q228) Choose the odd one out w.r.t. parasitism Show Answer

Q229) Which of the following is correct about host-specific parasites? Show Answer

Q230) 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

Q231) The evolutionary reason a given organism interacts with another organism is to Show Answer

Q232) Which of the following is not a form of mutualism? Show Answer

Q233) Plants that produce fruits are part of a _________ mutualism. Show Answer

Q234) Parasitism is an example of a ______ interaction. Show Answer

Q235) Pathogens are classified as Show Answer

Q236) The evolution of the animal immune system was probably driven by Show Answer

Q237) Which of the following statements about competition is false? Show Answer

Q238) When two similar species live in the same area, they may evolve to become more different in order to Show Answer

Q239) Do humans exhibit any mutualistic relationships? Show Answer

Q240) 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

Q241) 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

Q242) 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

Q243) Consumers can alter which of the following characteristics of victims? Show Answer

Q244) The level of competition between species depends on Show Answer

Q245) Interactions among organisms can have effects at which of the following levels? Show Answer

Q246) 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

Q247) 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

Q248) Mutualistic relationships Show Answer

Q249) 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

Q250) 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

Q251) Which of the following is not a way a parasite can spend its life? Show Answer

Q252) 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

Q253) 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

Q254) 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

Q255) 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

Q256) Which of the following is the example of biological control? Show Answer

Q257) A secondary compound is not a part of the plants Show Answer

Q258) No predator become proficient at acquiring prey because Show Answer

Q259) You never see cattle or goats browsing on weed calotropis. Why? Show Answer

Q260) According to Darwin which of the following is a potent force in organic evolution? Show Answer

Q261) Which of the following is not entirely true fact? Show Answer

Q262) In certain shallow lake of South America, the visiting flamingos and resident fishes compete for _______ as their food. Show Answer

Q263) Two organisms that use the same resources when those sources are in short supply are said to be Show Answer

Q264) 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

Q265) Two species of barnacles vie for space in the intertidal zone. The one that remains is Show Answer

Q266) The interaction between smaller barnacle Chthamalus and larger barnacle Balanus in intertidal zone is Show Answer

Q267) Find out the false one? Show Answer

Q268) Connell's elegant field experiments are related to Show Answer

Q269) The American MacArthur observed, in 1985 that 5 species of similar warblers coexist on spruce tree because they Show Answer

Q270) Which ecological unit or relationship is least related to abiotic factors? Show Answer

Q271) The overall role of an organism in its environment is called a(n) _______. Show Answer

Q272) Select the false one Show Answer

Q273) 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

Q274) When resources are limited, the competitively superior species eventually eliminate the other species. It is relatively Show Answer

Q275) Community its Show Answer

Q276) Population dynamics is related to Show Answer

Q277) In small isolated tribal population Show Answer

Q278) Term homeostasis in an ecosystem refers to Show Answer

Q279) The spread of opuntia was controlled by Show Answer

Q280) A bird introduced from another country became a serious pest due to Show Answer

Q281) At asymptote stage, the population is Show Answer

Q282) Changing population is Show Answer

Q283) Migration in birds is guided in part by Show Answer

Q284) Which of the following was not usually observed by G. F. Gause in his studies on interspecific competition? Show Answer

Q285) Which of the following is correct? Show Answer

Q286) If two sympatric species occupy very similar niche under natural condition, one would expect Show Answer

Q287) Which one of the following populations will show the greatest population increase in the next year, assuming exponential growth? Show Answer

Q288) When does competitive exclusion theory state? Show Answer

Q289) Through resource partitioning Show Answer

Q290) Which of the following is not correct? Show Answer

Q291) 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

Q292) 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

Q293) The most spectacular and evolutionarily fascinating examples of mutualism is found in Show Answer

Q294) 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

Q295) Which of the following plants employs 'sexual deceit' to get pollination done by a species of bee? Show Answer

Q296) An example of species-specific co-evolution is Show Answer

Q297) Resource partitioning includes Show Answer

Q298) 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

Q299) Ecologists say that a niche is like a species ________, while habitat is like its ________. Show Answer

Q300) 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

Q301) Which graph correctly depicts the rate of respiration of a non-hibernating mammal living in cold climate? Show Answer

Q302) Large Woody Vines are more commonly found in Show Answer

Q303) Which one of the following is categorized as a parasite in true sense? Show Answer

Q304) Natural selection operates at Show Answer

Q305) 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

Q306) Verhulst-Pearl logistic growth pattern is Show Answer

Q307) The interaction is detrimental to both the species, in Show Answer

Q308) The association of Staphylococcus and Penicillium is Show Answer

Q309) The association between clown fish and sea anemone is the same as between Show Answer

Q310) In growth pattern (1 - N/K) is Show Answer

Q311) A population growth becomes asymptote when population density Show Answer

Q312) When the value of 'r' is significantly low as compared to another species, it is better known by Show Answer

Q313) Which of the following is most appropriately defined? Show Answer

Q314) What are "large undisturbed areas where wild life is protected in its natural habitat"? Show Answer

Q315) The growth rate of a population during the exponential phase is ________ and during the maximum stationary phase of growth are ______. Show Answer

Q316) The animals that rely on the heat from environment than metabolism to raise their body temperature are, in strict sense called Show Answer

Q317) Formation of tropical forests needs mean annual temperature and mean annual precipitation as Show Answer

Q318) 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

Q319) 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

Q320) 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

Q321) The success of mammals on earth is largely because Show Answer

Q322) Which one of the following causes population explosion? Show Answer

Q323) 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

Q324) Allen's rule applies to Show Answer

Q325) Which statement explains why two species cannot permanently occupy the same ecological niche? Show Answer

Q326) 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

Q327) In which of the following interactions both partners are adversely affected? Show Answer

Q328) An association of individuals of different species living in the same habitat and having functional interactions is Show Answer

Q329) The correct sentences in the following is/are Show Answer

Q330) Which of the following is correct? Show Answer

Q331) 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

Q332) 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

Q333) Which of the following is correct with reference to population growth? Show Answer

Q334) Gause's principle of competitive exclusion states that Show Answer

Q335) It is much easier for a small animal to run uphill than for a large animal because Show Answer

Q336) 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

Q337) Which of the following is correct for r-selected species? Show Answer

Q338) 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

Q339) The principle of competitive exclusion was stated by Show Answer

Q340) Close resemblance in the appearance of Monarch butterfly and Queen butterfly is an example of Show Answer

Q341) Amongst hydrophytes finely dissected leaves occur in Show Answer

Q342) Place occupied by an organism in relation to environment is Show Answer

Q343) Cuscuta is a Show Answer

Q344) Statement 1: True xerophytes store water in the form of mucilage which helps to withstand prolonged
period of drought.
Statement 2: Vascular and mechanical tissues are well developed in true xerophytes. Show Answer

Q345) The ecological niche of population is a Show Answer

Q346) Niche is defined as the Show Answer

Q347) When two related populations occupy geographically or spatially separate areas, they are called Show Answer

Q348) The maximum growth rate occurs in Show Answer

Q349) Interspecific interaction could be Show Answer

Q350) The relationship between the alga Microcystis and the surroundings fauna correspond to Show Answer

Q351) Climate is the Show Answer

Q352) Basic unit of ecological hierarchy is Show Answer

Q353) Population is the total number of Show Answer

Q354) Ecotype is Show Answer

Q355) 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

Q356) Mass of living matter at a trophic level in an area at any time is called Show Answer

Q357) The term ‘Niche’ was first used by Show Answer

Q358) In the association between two organisms, if one organism is benefitted and the other is not benefitted, this relationship is known as Show Answer

Q359) Ephemerals are xerophytes that are Show Answer

Q360) The size of the clay particle is less than Show Answer

Q361) 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

Q362) Plats which behave as mesophytes in rainy season and as xerophytes in summers are called Show Answer

Q363) A species inhabiting different geographical area is known as Show Answer

Q364) 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

Q365) Population growth curve in most animals, except humans is Show Answer

Q366) Nosema notabilis is an example for Show Answer

Q367) Ecologist say that niche is like a species …A…, while habitat is like a …B… there A and B indicate Show Answer

Q368) Temperature is very significant to the living beings because of Show Answer

Q369) Autecology is the study of relationship between Show Answer

Q370) Competition for light, nutrients and space is most severe between
Show Answer

Q371) Which of the following is true regarding exponential growth? Show Answer

Q372) Mycorrhizal represents an intimate mutualistic relationship between Show Answer

Q373) 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

Q374) 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

Q375) July 11th is observed as Show Answer

Q376) Light is Show Answer

Q377) Pedology refers to study of Show Answer

Q378) Submerged hydrophytes show Show Answer

Q379) 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

Q380) Weather is the Show Answer

Q381) Sea plants are an example of Show Answer

Q382) Halophytes are Show Answer

Q383) Adaptation may be Show Answer

Q384) …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

Q385) The physiological capacity to produce offsprings is called Show Answer

Q386) How many horizons are present in the soil profile? Show Answer

Q387) In … phase population adopt itself to new environment and starts to increase its number Show Answer

Q388) The association of animals when both partners are benefitted is Show Answer

Q389) 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

Q390) The most ecologically relevant environmental factor Show Answer

Q391) The closely related morphologically similar sympatric population, but reproductively isolated are designated as Show Answer

Q392) Term ‘ecology’ was given by Show Answer

Q393) Regulators are also called Show Answer

Q394) Diapause is Show Answer

Q395) 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

Q396) Which of the following is categorised as a parasite in true sense? Show Answer

Q397) Ratio between mortality and natality is called Show Answer

Q398) 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

Q399) Why a population fluctuate when it reaches to carrying capacity? Show Answer

Q400) Small fish get stuck near the bottom of a shark and derives its nutrition from it. This kind of association is called as Show Answer

Q401) Temperature decreases progressively from the Show Answer

Q402) A population growing in a habitat with limited resources shows four phases of growth in the following sequence Show Answer

Q403) Population density is the population per unit Show Answer

Q404) 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

Q405) Radiation below the visible range are called Show Answer

Q406) Competition of species leads to Show Answer

Q407) Model is Show Answer

Q408) 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

Q409) Ecology is the branch of biology which deals with interaction between Show Answer

Q410) Life history traits of organisms have evolved in relation to the constraints imposed by which components of habitat Show Answer

Q411) 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

Q412) B-horizon is also called Show Answer

Q413) Plant grows best in the
I.acidic soil
II.basic soil
III.neutral soil
IV.slightly acidic soil
Choose the correct combination Show Answer

Q414) Choose the incorrect statements
Show Answer

Q415) Pollination is an example of Show Answer

Q416) Root cap is not found in Show Answer

Q417) Which model is considered a more realistic one? Show Answer

Q418) Salt concentration (parts par thousand) is less than 5% in Show Answer

Q419) An interaction favourable to both population, but no obligatory to either is Show Answer

Q420) Phenomenal and rapid increase of population in a short period is called Show Answer

Q421) Life on earth originated in Show Answer

Q422) The soil with poorest water holding capacity is Show Answer

Q423) Differentiation of various tissue and organs in response to light is called Show Answer

Q424) In a population, unrestricted reproductive capacity is called Show Answer

Q425) 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

Q426) 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

Q427) Partial regulators are the organism which Show Answer

Q428) 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

Q429) Altitude sickness is Show Answer

Q430) Plants grown on sandy soil, are grouped under Show Answer

Q431) Ecology is basically concerned with how many levels? Show Answer

Q432) An unrestricted reproductive capacity is called Show Answer

Q433) Asymptote stage of the population is the stage of population in which the population is Show Answer

Q434) Conformers are inactive in adverse conditions due to Show Answer

Q435) A secondary compound are the part of the plants Show Answer

Q436) Age structure of a population influences population growth because Show Answer

Q437) 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

Q438) For better survival of the human population, which of the following steps is most important? Show Answer

Q439) Photosynthetic yield is maximum at the Show Answer

Q440) 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

Q441) Schimper’s second low related to Show Answer

Q442) 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

Q443) 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

Q444) 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

Q445) 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

Q446) 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

Q447) Which of the following characters explain the bell-shaped curve? Show Answer

Q448) In which regions of the world are hot deserts located? Show Answer

Q449) Population density of a population in a given habitat during a given period fluctuates due to change in Show Answer

Q450) 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

Q451) Different organism are adapted to their environment in terms of not only survival but also reproduction.
This statement belongs to Show Answer

Q452) Which determines the flora and fauna of a place? Show Answer

Q453) Eurythermals are the organism which Show Answer

Q454) Plants growing on sand and gravel are called Show Answer

Q455) In aquatic environment the types of benthic animals are determined by Show Answer

Q456) The growth rate of a population stabilizes after Show Answer

Q457) Why exotic species become invasive sometime and starts spreading fast because of Show Answer

Q458) In commensalism Show Answer

Q459) There are two optional ways of exploitation. One way is parasitism. Which is the other one? Show Answer

Q460) Population size of Siberian cranes at Bharatpur wetlands in any year is Show Answer

Q461) Prickly pear cactus species introduced into Australia in Show Answer

Q462) Pattern of population results in a J-shaped curve obtained in Show Answer

Q463) If non-limiting conditions are provided then what will happen? Show Answer

Q464) In which one of the following habitats does the diurnal temperature of soil surface vary most? Show Answer

Q465) Character displacement take place when there is Show Answer

Q466) Gloger’s rule related to the Show Answer

Q467) Positive growth or rapid increase in the population is indicated by Show Answer

Q468) When there are large number of post-reproductive or older individuals and lesser number of pre- reproductive individuals then that population is Show Answer

Q469) 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

Q470) Prickly pear cactus (an exotic species) can brought under control (in Australia) by using Show Answer

Q471) Population is Show Answer

Q472) Ecological hierarchy comprises, which of the following sequence Show Answer

Q473) In India, human population is heavily weighed towards the younger age group as a result of Show Answer

Q474) Aerenchyma is the characteristics feature of Show Answer

Q475) Predator helps to create checks on Show Answer

Q476) 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

Q477) The niche of a population is defined as Show Answer

Q478) Geometric representation of age structure is characteristic of Show Answer

Q479) Which of the following is not true for a species? Show Answer

Q480) Zero growth means Show Answer

Q481) 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

Q482) Sigmoid growth curve is represented by Show Answer

Q483) In which one of the following pairs is the specific characteristic of soil not correctly matched? Show Answer

Q484) All aquatic vertebrates and most molluscs and cry fishes are Show Answer

Q485) Average temperature of thermal springs and deep sea hydrothermal vents exceeds Show Answer

Q486) In the oceans, the environment is perpetually dark at Show Answer

Q487) Regulators are the their animals which Show Answer

Q488) 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

Q489) Ecosystem components includes Show Answer

Q490) Monarch butterflies are highly distasteful to predator due to Show Answer

Q491) Species living in a restricted geographical area is Show Answer

Q492) Pneumatophores have lenticels for Show Answer

Q493) Abiotic factors affects the
I. Structure of organisms
II. Physiology of organisms
III.Behaviour of organisms
Show Answer

Q494) Which one of the following is a matching pair of certain organism(s) and the kind of association? Show Answer

Q495) Nature and properties of soil in different places vary due to Show Answer

Q496) Zero growth of population is indicated by Show Answer

Q497) 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

Q498) The productivity and distribution of plants mainly depends on Show Answer

Q499) Which one is the edaphic factor in biosphere? Show Answer

Q500) Population density of terrestrial organisms is measured in terms of individuals per Show Answer

Q501) 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

Q502) 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

Q503) Which one is the example of sexual parasite? Show Answer

Q504) Good soil is that which Show Answer

Q505) Living in same habitat, organisms of same species of form Show Answer

Q506) Which of the following factors increase, the size of a population? Show Answer

Q507) Population size is more technically called Show Answer

Q508) Which of the following parameter of the population can be negative? Show Answer

Q509) If the rate of addition of new members increases with respect to the individual host of the same
population, then the graph obtained has: Show Answer

Q510) How seals can survive in polar climate where the temperature prevails below 0℃? Show Answer

Q511) Identify the basic levels of ecology
I. Organisms
II. Populations
III. Communities
IV. Biomes
V. Human
VI. Vertebrates
Choose the correct option Show Answer

Q512) Humus is formed by Show Answer

Q513) An indirect competition for shared resources such as a particular nutrient is called Show Answer

Q514) 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

Q515) The permanent decrease in population number occurs due to Show Answer

Q516) 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

Q517) Keystone species deserve protection because these Show Answer

Q518) There is more competition for survival between Show Answer

Q519) Find odd one out, according to parasitism. Show Answer

Q520) They are dominant plants of the cold desert Show Answer

Q521) Study of environmental and animal relation is Show Answer

Q522) Sunlight is available as a source of energy. The sunlight is very much important in Show Answer

Q523) 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

Q524) Which one is incorrect regarding parasitism? Show Answer

Q525) The interaction of species with the environment is called as Show Answer

Q526) Diapause is stage of suspended development in lakes and ponds. Find out the season in which it occurs Show Answer

Q527) 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

Q528) Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called Show Answer

Q529) Pseudo copulation occurs in Show Answer

Q530) The age of pyramid with broad base indicates Show Answer

Q531) A high density of tiger population in an area can result in Show Answer

Q532) Plants developing in dry condition are Show Answer

Q533) Natality refers to the number of Show Answer

Q534) 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

Q535) Association of animals belonging to different species, where both partners are benefitted, is called Show Answer

Q536) Why no predator become proficient in acquiring prey? Show Answer

Q537) Hierarchy is Show Answer

Q538) The percentage of soil volume occupied by pore space is called porosity of soil. It is minimum in Show Answer

Q539) The inherent maximum capacity of an organism to reproduce or increase in number is called as Show Answer

Q540) 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

Q541) The species of plants that play a vital role in controlling the relative abundance of other species in a community are called Show Answer

Q542) 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

Q543) 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

Q544) How many types of age pyramid are there? Show Answer

Q545) Competition occurs when Show Answer

Q546) 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

Q547) 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

Q548) Lichens represents an intimate mutualistic relationship between Show Answer

Q549) The science dealing with soil is Show Answer

Q550) Biological control methods adopted in agriculture pest control are based on the Show Answer

Q551) Viscum album grows on trees. This is an example of Show Answer

Q552) ‘Two closely related species competing for same resources cannot co-exist indefinately’. This law is also called Show Answer

Q553) Epiphyte is an example of Show Answer

Q554) Barnacles growing on the back of whale is an example for Show Answer

Q555) How much percentage of animals on this earth are regulators? Show Answer

Q556) Plants of aquatic habitat is called Show Answer

Q557) 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

Q558) Which type of age pyramid obtained when the population is growing? Show Answer

Q559) The formula of growth rate for population in a given time is Show Answer

Q560) Genetically adapted population to a particular habitat is called Show Answer

Q561) Conformers are also called Show Answer

Q562) Hydrophytes are characterised by Show Answer

Q563) Interspecific interactions arise from the interaction of Show Answer

Q564) Gause’s law is true only when Show Answer

Q565) If natality rate is parallel to mortality rate then population Show Answer

Q566) Sex ratio is the Show Answer

Q567) 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

Q568) Biotic potential or potential natality means Show Answer

Q569) Formation of wide variety of habitats takes place by Show Answer

Q570) Population of any species is Show Answer

Q571) Smallest unit of ecology is Show Answer

Q572) 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

Q573) At high altitude we feels the sickness. The reason for sickness may be due to Show Answer

Q574) What is probiosis? Show Answer

Q575) Logistic growth is represented by which equation Show Answer

Q576) 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

Q577) Plants growing in dry and saline soil are called Show Answer

Q578) 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

Q579) The number of organisms in population are added by: Show Answer

Q580) Exponential growth in plants can be expressed as Show Answer

Q581) Homeostasis is Show Answer

Q582) Ecology at the organism level is also called Show Answer

Q583) Starfish pisaster is the important predator in intertidal communities of Show Answer

Q584) 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

Q585) If the strong partner is benefitted and the weak partner is damaged. It is known as Show Answer

Q586) Attribute of the organisms (morphological, physiological and behavioural) that enables organism to survive and reproduce in its habitat is called Show Answer

Q587) Altitude sickness occurs at high Mountains. This sickness have symptoms like Show Answer

Q588) 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

Q589) You never see any cattle or goat browsing on Calotropis due to Show Answer

Q590) The desert plants in order to tolerate water stress, show Show Answer

Q591) The type of population, where pre-reproductive animals occur in large numbers, is Show Answer

Q592) Which characteristics determine the percolation and water holding capacity of soils? Show Answer

Q593) 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

Q594) 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

Q595) Choose the wrong statement Show Answer

Q596) Reproductive value of an individual is greatest just before Show Answer

Q597) 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

Q598) Populations termed r-strategists Show Answer

Q599) 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

Q600) Environment factor (s) that characterize the habitat of ecosystem is/are Show Answer

Q601) Two species occupying same or overlapping area are called as Show Answer

Q602) Predation is Show Answer

Q603) Formation of major biomes such as desert, rainforest takes place by Show Answer

Q604) Epiphytes that are growing on a mango branch is an example of which of the following? Show Answer

Q605) Who is known as the father of Ecology in India?
Show Answer

Q606) Given below are two statements:
Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II: Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. In the light of the above statements, choose the most appropriate answer from the options given below:

Show Answer

Q607) Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population? Show Answer

Q608) When will the population density increase, under special conditions?
When the number of : Show Answer

Q609) Given below are two statements:
Statement I: Gause's competitive exclusion principle states that two
closely related species competing for different resources cannot exist
indefinitely.
Statement II: According to Gause's principle, during competition, the
inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the
options given below : Show Answer

Q610) Plants offer rewards to animals in the form of pollen and nectar and the
animals facilitate the pollination process. This is an example of : Show Answer

Q611) If there are 250 snails in a pond, and within a year their number
increases to 2500 by reproduction. What should be their birth rate per
snail per year? Show Answer

Q612) Given below are two statements:
Statement I : Gause's 'Competitive Exclusion Principle' states that two
closely related species competing for the same resources cannot co-
exist indefinitely and competitively inferior one will be eliminated
eventually.
Statement II : In general, carnivores are more adversely affected by
competition than herbivores.
In the light of the above statements, choose the correct answer from the
options given below: Show Answer

Q613) Two butterfly species are competing for the same nectar of a flower in a
garden. To survive and coexist together, they may avoid competition in
the same garden by Show Answer

Q614) Which one of the following statements cannot be connected to
Predation? Show Answer

Q615) While explaining interspecific interaction of population, (+) sign is
assigned for beneficial interaction, (–) sign
is assigned for detrimental interaction and (0) for neutral interaction.
Which of the following interactions can
be assigned (+) for one specifies and (–) for another specifies involved
in the interaction ? Show Answer

Q616) Inspite of interspecific competition in nature, which mechanism the
competing species might have evolved for their survival? Show Answer

Q617) Amensalism can be represented as: Show Answer

Q618) The process of growth is maximum during Show Answer

Q619) Secondary metabolites such as nicotine, strychnine and caffeine are
produced by plants for their Show Answer

Q620) Which of the following is not an attribute of a population? Show Answer

Q621) Which of the following statements are correct with reference to a transcription unit?
A. A transcription unit in DNA is defined primarily by three regions promoter, structural gene and terminator.
B. The promoter is said to be located towards the 5'-end of the structural gene.
C. The promoter is a DNA sequence that provides binding site for RNA polymerase.
D. The promoter defines the template and coding strands.
E. The terminator is located towards the 3'-end of the coding strand and it defines the end of the process of transcription.
Choose the correct answer from the options given below:
Show Answer

Q622) Which of the following equations depicts Verhulst-Pearl logistic population growth?
Show Answer

Q623) Which one of the following is an appropriate example of sexual deceit?
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Q624) Choose the correct statements regarding population interactions between two species.
A. In both parasitism and commensalism, only one species benefits and the other species is harmed.
B. Both species benefit in mutualism.
C. Both species benefit in commensalism.
D. In parasitism, only one species benefits and the other species is harmed.
E. In amensalism, one species is harmed and the other is unaffected.
Choose the correct answer from the options given below:
Show Answer