Q36 of 163 Page 226

Write a common food chain of a pond ecosystem having four links.

(B) Pond ecosystem



Algae/producer are eaten by zooplankton like protozoan which are consumed by small fishes. Small fishes are prey of large fishes or large carnivores.


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35

Construct.

(a) a long food chain, and


(b) a short food chain, ending with man.

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State one advantage of using jute bags over plastic bags for shopping.

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We do not clean ponds or lakes but an aquarium needs to be cleaned periodically. Why?

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What will be the consequence of the absence of decomposers in the ecosystem?