Practice Test


Q1) Organisms inhabiting a common environment belong to the same: Show Answer


Q2) A biotic community is an assemblage of: Show Answer


Q3) A community is not able to survive without: Show Answer


Q4) Which of the following term is used for the "study of plant community"? Show Answer


Q5) A community that starts the process of succession in a habitat is called: Show Answer


Q6) When the vegetation of any region reaches climatic climax, it is: Show Answer


Q7) Primary succession starts with: Show Answer


Q8) In a biotic community the most important factor for survival of an animal is: Show Answer


Q9) The basic unit in ecological studies is population. The sum of all the populations of the same kind of organisms form: Show Answer


Q10) Primary succession refers to the development of communities on a: Show Answer


Q11) The first plants to appear on a badly burnt forest area will most probably be: Show Answer


Q12) The quills of porcupine are an example of: Show Answer


Q13) An advantage of being a herbivore that feeds only on one or a few related plant species is: Show Answer


Q14) A leaf adapted to a warm dry climate is: Show Answer


Q15) An insect survives the cold of winter in a dormant stage by converting its glycogen to: Show Answer


Q16) A community with no living green plant is: Show Answer


Q17) It is a flock of sheep what is it of lions? Show Answer


Q18) In which type of community, the number of species per unit area will be more: Show Answer


Q19) Biotic potential is counteracted by: Show Answer


Q20) Physical space occupied by an organism (and also its functional role in a community) is called: Show Answer


Q21) Animals-Cockroaches scorpions, ants, lizards, mice-which share their abode are called: Show Answer


Q22) Generally succession leads to a climax community composed of: Show Answer


Q23) The effect of interspecific competition on niches is to make them: Show Answer


Q24) The most effective defences of plants against the herbivores are: Show Answer


Q25) Many angiosperms and ferns synthesize a molecule similar to ecdysone. It causes the insect herbivore that eat it to: Show Answer


Q26) No predator can become proficient at acquiring prey because: Show Answer


Q27) Symbiosis is an association between two species in which: Show Answer


Q28) Which of the following interaction will not promote co-evolution? Show Answer


Q29) The kind of climax community in an area depends mostly on the areas: Show Answer


Q30) Most agriculture makes use of plants from: Show Answer


Q31) 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


Q32) 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


Q33) More of the number of species in a community, more will be: Show Answer


Q34) Plant community may be defined as: Show Answer


Q35) Intermediate communities between pioneer and climax communities are called as: Show Answer


Q36) Occurrence of 200 chlorella in the body wall of Hydra is: Show Answer


Q37) When an organism is benefited without affecting the other the relationship is termed: Show Answer


Q38) A flowering plant and the animal that pollinates it are examples of: Show Answer


Q39) Animals which can tolerate only a narrow range of salinity are said to be: Show Answer


Q40) Antagonistic interaction include: Show Answer


Q41) The most successful parasite is the one that: Show Answer


Q42) Lichens are described as indicators of: Show Answer


Q43) In commensalism: Show Answer


Q44) Lichens do not normally grow in cities: Show Answer


Q45) Primary productivity of ecosystem refers to: Show Answer


Q46) The individuals in the uppermost ring pyramid represent the one with: Show Answer


Q47) Which of the following is a temporary parasite? Show Answer


Q48) An association of a small fish (Fierasfer) inhabiting in the cloaca of sea cucumber is an example of: Show Answer


Q49) The animals which preys the other living species is known as: Show Answer


Q50) An association of different interrelated populations belonging to different species in common environment which can survive in nature is called: Show Answer


Q51) A direct food relation between two species of animals in which one animal kills and feed on another is referred to as: Show Answer


Q52) An association of two species where one is benefited and other remains unaffected or unharmed, it is called: Show Answer


Q53) An association of two species of organisms where both the partners derive benefit from each other is called: Show Answer


Q54) An association between a sea anemone Adamsia, and a hermit crab living in a gastropod shell is: Show Answer


Q55) The ecological niche of an organism denotes: Show Answer


Q56) The transition zone where two different types of communities meet is called: Show Answer


Q57) Mimicry is a device for: Show Answer


Q58) The conversion of a lake to a terrestrial community is a form of: Show Answer


Q59) An ecological community is an assemblage of: Show Answer


Q60) Which of the following is a negative interaction between the population? Show Answer


Q61) One of the following relationship is useful to one organism and of no significance to other: Show Answer


Q62) Plants growing well in hill crevices are: Show Answer


Q63) A community is: Show Answer


Q64) Plants which are attached to stones and rocks: Show Answer


Q65) What could be the meeting point of biological and ecological hierarchies? Show Answer


Q66) The sum of the population of the same king constitutes a: Show Answer


Q67) The philosophy behind the existence of a community is: Show Answer


Q68) Generally the time taken for a secondary succession to reach climax stage is: Show Answer


Q69) Mutualism exists between: Show Answer


Q70) Sanke is a: Show Answer


Q71) Utricularia is a: Show Answer


Q72) In ecological succession from pioneer community to climax community, the biomass: Show Answer


Q73) A prey population can weaken the search image of its predator by being: Show Answer


Q74) Organisms sharing a common environment belong to same: Show Answer


Q75) Female anopheles mosquitoes sucking human blood at intervals are: Show Answer


Q76) In a population where competition between individuals is severe, then the distribution is said to be: Show Answer


Q77) Information of birth rate, death rate, sex ratio, age distribution of population can be got from: Show Answer


Q78) Antelopes are: Show Answer


Q79) Most interacting populations are: Show Answer


Q80) Desert can be converted to green lands by: Show Answer


Q81) The animals, which are capable of digging the earth, are: Show Answer


Q82) Which of the following is not a desert animal? Show Answer


Q83) Which of the following is biotic factor? Show Answer


Q84) The bird enters the mouth of crocodile and feeds on parasitic leeches. The bird gets food and crocodile gets rid of blood sucking leeches. Both the partners can live independently. Such an association is: Show Answer


Q85) In minicry, the individual which is benefited is called: Show Answer


Q86) When animals feed on other dead animals which had died naturally or had been killed by another animals, this relationship is termed as: Show Answer


Q87) A smoother crop is the one which: Show Answer


Q88) Which one of the following is protective device? Show Answer


Q89) Growth of Tagetes frees the soil of: Show Answer


Q90) Relationship between water-fern Azolla and nitrogen-fixing cyanobacterium Anabaena is: Show Answer


Q91) Gause's hypothesis/principle is related to: Show Answer


Q92) The relationship between one species and another within a community that has evolved through interactions is based upon: Show Answer


Q93) The interaction among organisms in a community called as biotic factors influence: Show Answer


Q94) Sedge is: Show Answer


Q95) Perennial grass stage is represented by: Show Answer


Q96) Series of changes on previously barren area is: Show Answer


Q97) Crustose lichen is: Show Answer


Q98) Secondary succession will not be completed if the bare area is invaded by: Show Answer


Q99) Plant succession occurring in a sandy area is: Show Answer


Q100) A plant growing on rock is: Show Answer


Q101) Scientific study of mimicry was carried out first by: Show Answer


Q102) A butterfly of India when resting with folded wings resembles a dead leaf. This mechanism of protection is called: Show Answer


Q103) Stick insect (Carausius) mimicry like a thin dry branch and dead leaf or oak leaf butterfly (Kallima) looks like a dead leaf. It is: Show Answer


Q104) The mimetic imitates other organism in: Show Answer


Q105) Types of aggressive mimicry are: Show Answer


Q106) The first scientific account of mimicry was given by: Show Answer


Q107) Which one is not an example of concealing protective mimicry? Show Answer


Q108) Palatable viceroy butterfly (Limenitis archippus) resembles a distasteful monarch butterfly (Donaus plexippus) for its protection. This is called: Show Answer


Q109) When predator (mimic) remains hidden from prey to catch it suddenly as in preying mantis, it shows: Show Answer


Q110) When the mimic attracts its prey, it is called: Show Answer


Q111) When a palatable female butterfly (e. g. Viceroy butterfly) copies an unpalatable species (Monarch butterfly) the type of adaptation is called: Show Answer


Q112) Fungal association of roots of higher plants in mycorrhiza is known as: Show Answer


Q113) Hyperparasite is a kind of parasite which: Show Answer


Q114) Plants obtaining nourishment from other plants by haustoria are: Show Answer


Q115) A successful parasite is the one which: Show Answer


Q116) Which of the following statements is correct regarding the two organisms in commensalism? Show Answer


Q117) Which is not characteristic of intestinal symbionts? Show Answer


Q118) Ecological succession on sand is: Show Answer


Q119) Cause of mimicry is: Show Answer


Q120) Which of the following insects mimics thin dry branches of the plant on which it lives? Show Answer


Q121) The individuals that shows mimicry is called: Show Answer


Q122) Heterodon flattens its head, producers frequent hissing and strikes to advertise as if it is dangerous. This is an example of: Show Answer


Q123) In conscious mimicry: Show Answer


Q124) Which of the following resembles a dry leaf? Show Answer


Q125) July 11 is observed as: Show Answer


Q126) Which among the following is the primary function of mimicry prevalent in some animals? Show Answer


Q127) Succession in an ecosystem is the result of: Show Answer


Q128) Mycorrhiza is an example of: Show Answer


Q129) 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 it is called: Show Answer


Q130) Maximum growth rate occurs in: Show Answer


Q131) Lichens are well known combination of an alga and a fungus where fungus has: Show Answer


Q132) An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having: Show Answer


Q133) A terrestrial animal must be able to: Show Answer


Q134) What is keystone speices? Show Answer


Q135) The most thoroughly studied of the known bacteriaplant interaction is the: Show Answer


Q136) Term used to describe non-dominant species that dictate community structure is: Show Answer


Q137) In succession, complexities in structure: Show Answer


Q138) The presence of diversity at the junction of territories of two different habitats is known as: Show Answer


Q139) Small fish gets stuck near the bottom of a shark and derive its nutrition from it. This kind of association is called as: Show Answer


Q140) Praying mantis is a good example of: Show Answer


Q141) The formula for exponential population growth is: Show Answer


Q142) Find out the correct order of succession levels in xerarch: Show Answer


Q143) The concept of chemical evolution is based on: Show Answer


Q144) If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur: Show Answer


Q145) Which one of the following is considered as pioneer community in xerarch? Show Answer


Q146) Which one of the following statements is correct for secondary succession? Show Answer


Q147) Which of the following is correct: Show Answer


Q148) A set of local populations connected by dispersing individuals is called: Show Answer


Q149) The increase in number of individuals in a population under given environmental condition is called: Show Answer


Q150) The inherent capacity of an organism to reproduce or increase in number is termed biotic potential designated by the symbol: Show Answer


Q151) The J-shaped growth form is represented by which of the following exponential equation: Show Answer


Q152) The nature of mimic action could be: Show Answer


Q153) The S-shaped sigmoid growth form is represented by which of the following equation, which includes an expression for environmental resistance: Show Answer


Q154) Commensalism is a type of interaction which is: Show Answer


Q155) Which of the following interaction has adverse effect on both the species? Show Answer


Q156) One of the following is a functional association not merely living together: Show Answer


Q157) Select the mismatch pair: Show Answer


Q158) In terrestrial communities, which of the following are dominants? Show Answer


Q159) The species having much greater influence on community characteristics, relative to their low abundance or biomass are called: Show Answer


Q160) Which of the following is pioneer in succession in hydarch? Show Answer


Q161) Select the correct statement: Show Answer


Q162) An association of two species in which both species are benefited is called: Show Answer


Q163) Succession involves a turnover of species during: Show Answer


Q164) Select the statement, which best explains commensalism: Show Answer


Q165) Community is best defined as aggregation of: Show Answer


Q166) Parasite can be best explained as an organism which depends on: Show Answer