Q13 of 22 Page 400

Mention the role of microorganisms like bacteria and fungi in the ecosystem.

Microorganisms such as bacteria and fungi are decomposers. They decompose dead and decaying organic matter of plants and animals in the process of decomposition. In decomposition microorganisms’ breakdown dead and decaying matter and release of nutrients back into the environment.


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Why is excessive use of chlorofluorocarbons a cause of concern?

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Suggest suitable mechanism(s) for waste management in fertiliser industries.

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(a) Why are green plants called producer?

(b) State the scientific term used for progressive accumulation of harmful chemicals at each trophic level of a food chain.