21. Those that eat herbivores are called:
(a) Primary consumers
(b) Secondary consumer
(c) Primary carious
(d) (a) and (c)✅
22. Animals that eat both plants and animals are called:
(a) Herbivores
(b) Nivores
(c) Omnivores✅
(d) All above
23. Man is an example of:
(a) Omnivores✅
(b) Herbivore
(c) Carnivores
(d) None
24. Organisms that derive their energy by decomposing dead remains of animals and plants are called:
(a) Producers
(b) Consumers
(c) Decomposers✅
(d) None of the above
25. The inter relationship between organisms in getting of their food is known as:
(a) Food web
(b) Food chain✅
(c) Both a and b
(d) None
26. Different chains are linked together to form a:
(a) food web✅
(b) food chain
(c) both a and b
(d) (a) or (b)
27. Organisms at the beginning of a food chain are usually:
(a) Numerous
(b) Small in size
(c) both a and b✅
(d) None above
28. The animals at the end of the chain are often:
(a) Large
(b) few in number
(c) both a and b✅
(d) None
29. The weight of a species population per unit area is called:
(a) biomass✅
(b) Boatwright
(c) Total weight
(d) None above
30. The energy is transferred by:
(a) water
(b) animals
(c) Eating being eaten✅
(d) None
31. The dead bodies of plants and animals are decomposed by:
(a) Micro-organisms✅
(b) Flies
(c) Earth
(d) All above
32. The earth atmosphere contain nitrogen gas by volume:
(a) 78%✅
(b) 90%
(c) 85%
(d) 50%
33. Nitrogen fixing bacteria are found in:
(a) Soil
(b) Root nodules of leguminous
(c) Both (a) and (b)✅
(d) None
34. Nitrogenous waste in animals is/are:
(a) Urea✅
(b) Uric acid
(c) Ammonia
(d) All above
35. In soil urea is converted to:
(a) Ammonia
(b) Nitrites
(c) both a and b✅
(d) None
36. The only thing required by an ecosystem from the outside is:
(a) Energy✅
(b) Heat
(c) Food
(d) None
37. The competition between members of different species is called:
(a) Site-specific competition✅
(b) Intraspecific competition
(c) Special competition
(d) (a) or (b)
38. Struggle between members of the same species is called:
(a) Intraspecific competition✅
(b) Interspecific competition
(c) Specific competition
(d) None
39. The association between organisms of different species, which live together for mutual benefit, is called:
(a) Symbiosis✅
(b) Parasitism
(c) Commensalism
(d) None
40. The association in which one partner gain benefit without benefiting or harming the other.
(a) Commensalism✅
(b) Symbiosis
(c) Mutualism
(d) None
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