Q5 of 50 Page 475

Pick the biodegradable substances from the following:

Cotton, rubber, leather, radioactive material.

Biodegradable substances are those which can be breakdown or degraded by microorganisms such as bacteria and fungi. Cotton, rubber and leather are biodegradable substances in above given substances.


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Why only 10% energy and mass is transferred to next level in a food chain?

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What is meant by a trophic level?

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Pick the non-biodegradable, substances from the following:

Animal bones, wool, paper, glass.

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Select from the following substances which have posed a threat to the environment:

Aerosols, consumers, bacteria, CFCs.