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

Q13) Biotic potential is counteracted by: Show Answer

Q14) Physical space occupied by an organism (and also its functional role in a community) is called: Show Answer

Q15) Generally succession leads to a climax community composed of: Show Answer

Q16) The effect of interspecific competition on niches is to make them: Show Answer

Q17) The most effective defences of plants against the herbivores are: Show Answer

Q18) Symbiosis is an association between two species in which: Show Answer

Q19) Which of the following interaction will not promote co-evolution? Show Answer

Q20) The kind of climax community in an area depends mostly on the areas: Show Answer

Q21) Most agriculture makes use of plants from: Show Answer

Q22) 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

Q23) 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

Q24) More of the number of species in a community, more will be: Show Answer

Q25) Plant community may be defined as: Show Answer

Q26) Intermediate communities between pioneer and climax communities are called as: Show Answer

Q27) Occurrence of 200 chlorella in the body wall of Hydra is: Show Answer

Q28) When an organism is benefited without affecting the other the relationship is termed: Show Answer

Q29) A flowering plant and the animal that pollinates it are examples of: Show Answer

Q30) Animals which can tolerate only a narrow range of salinity are said to be: Show Answer

Q31) The most successful parasite is the one that: Show Answer

Q32) Lichens are described as indicators of: Show Answer

Q33) In commensalism: Show Answer

Q34) Lichens do not normally grow in cities: Show Answer

Q35) Primary productivity of ecosystem refers to: Show Answer

Q36) The individuals in the uppermost ring pyramid represent the one with: Show Answer

Q37) An association of a small fish (Fierasfer) inhabiting in the cloaca of sea cucumber is an example of: Show Answer

Q38) The animals which preys the other living species is known as: Show Answer

Q39) An association of different interrelated populations belonging to different species in common environment which can survive in nature is called: Show Answer

Q40) A direct food relation between two species of animals in which one animal kills and feed on another is referred to as: Show Answer

Q41) An association of two species where one is benefited and other remains unaffected or unharmed, it is called: Show Answer

Q42) An association of two species of organisms where both the partners derive benefit from each other is called: Show Answer

Q43) An association between a sea anemone Adamsia, and a hermit crab living in a gastropod shell is: Show Answer

Q44) The ecological niche of an organism denotes: Show Answer

Q45) Mimicry is a device for: Show Answer

Q46) The conversion of a lake to a terrestrial community is a form of: Show Answer

Q47) An ecological community is an assemblage of: Show Answer

Q48) Which of the following is a negative interaction between the population? Show Answer

Q49) One of the following relationship is useful to one organism and of no significance to other: Show Answer

Q50) A community is: Show Answer

Q51) The sum of the population of the same king constitutes a: Show Answer

Q52) The philosophy behind the existence of a community is: Show Answer

Q53) Generally the time taken for a secondary succession to reach climax stage is: Show Answer

Q54) Mutualism exists between: Show Answer

Q55) Sanke is a: Show Answer

Q56) Utricularia is a: Show Answer

Q57) In ecological succession from pioneer community to climax community, the biomass: Show Answer

Q58) Organisms sharing a common environment belong to same: Show Answer

Q59) Female anopheles mosquitoes sucking human blood at intervals are: Show Answer

Q60) In a population where competition between individuals is severe, then the distribution is said to be: Show Answer

Q61) Information of birth rate, death rate, sex ratio, age distribution of population can be got from: Show Answer

Q62) Most interacting populations are: Show Answer

Q63) Desert can be converted to green lands by: Show Answer

Q64) Which of the following is biotic factor? Show Answer

Q65) 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

Q66) In minicry, the individual which is benefited is called: Show Answer

Q67) 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

Q68) Which one of the following is protective device? Show Answer

Q69) Relationship between water-fern Azolla and nitrogen-fixing cyanobacterium Anabaena is: Show Answer

Q70) Gause's hypothesis/principle is related to: Show Answer

Q71) Series of changes on previously barren area is: Show Answer

Q72) Secondary succession will not be completed if the bare area is invaded by: Show Answer

Q73) Plant succession occurring in a sandy area is: Show Answer

Q74) A plant growing on rock is: Show Answer

Q75) Scientific study of mimicry was carried out first by: Show Answer

Q76) A butterfly of India when resting with folded wings resembles a dead leaf. This mechanism of protection is called: Show Answer

Q77) The first scientific account of mimicry was given by: Show Answer

Q78) Fungal association of roots of higher plants in mycorrhiza is known as: Show Answer

Q79) Hyperparasite is a kind of parasite which: Show Answer

Q80) Which of the following statements is correct regarding the two organisms in commensalism? Show Answer

Q81) Which is not characteristic of intestinal symbionts? Show Answer

Q82) Cause of mimicry is: Show Answer

Q83) The individuals that shows mimicry is called: Show Answer

Q84) July 11 is observed as: Show Answer

Q85) Succession in an ecosystem is the result of: Show Answer

Q86) Mycorrhiza is an example of: Show Answer

Q87) Maximum growth rate occurs in: Show Answer

Q88) Lichens are well known combination of an alga and a fungus where fungus has: Show Answer

Q89) An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having: Show Answer

Q90) What is keystone speices? Show Answer

Q91) Term used to describe non-dominant species that dictate community structure is: Show Answer

Q92) In succession, complexities in structure: Show Answer

Q93) 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

Q94) The formula for exponential population growth is: Show Answer

Q95) Find out the correct order of succession levels in xerarch: Show Answer

Q96) The concept of chemical evolution is based on: Show Answer

Q97) Which one of the following is considered as pioneer community in xerarch? Show Answer

Q98) Which one of the following statements is correct for secondary succession? Show Answer

Q99) Which of the following is correct: Show Answer

Q100) A set of local populations connected by dispersing individuals is called: Show Answer

Q101) The increase in number of individuals in a population under given environmental condition is called: Show Answer

Q102) The J-shaped growth form is represented by which of the following exponential equation: Show Answer

Q103) The S-shaped sigmoid growth form is represented by which of the following equation, which includes an expression for environmental resistance: Show Answer

Q104) Commensalism is a type of interaction which is: Show Answer

Q105) Which of the following interaction has adverse effect on both the species? Show Answer

Q106) One of the following is a functional association not merely living together: Show Answer

Q107) Select the mismatch pair: Show Answer

Q108) In terrestrial communities, which of the following are dominants? Show Answer

Q109) The species having much greater influence on community characteristics, relative to their low abundance or biomass are called: Show Answer

Q110) Which of the following is pioneer in succession in hydarch? Show Answer

Q111) Select the correct statement: Show Answer

Q112) An association of two species in which both species are benefited is called: Show Answer

Q113) Succession involves a turnover of species during: Show Answer

Q114) Select the statement, which best explains commensalism: Show Answer

Q115) Community is best defined as aggregation of: Show Answer

Q116) Parasite can be best explained as an organism which depends on: Show Answer