Q.6 What is the niche of an organism in an ecosystem?
A) Role played by many organisms in an ecosystem C) Role played by community of microorganisms in
their ecosystem
B) Role played by a dead organism in an ecosystem D) Role played by an organism in its ecosystem.
Q.7 The distinct levels or links of food chain are called
A) Trophic level C) Energy pyramid
B) Food web D) Food chain
Q.8 A relationship between two or more organisms of different species in which all partners get
benefit is called
A) Symbiosis C) Commensalism
B) Parasitism D) Predation
Q.9 Bacteria and fungi are examples of
A) Producers C) Consumers
B) Decomposers D) Denvers
Q.10 The cause of acid rain is
A) Oxides of carbon C) Oxides of Sulphur
B) Oxides of nitrogen and Sulphur D) Oxides of nitrogen