Question
Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.

Answer

Any four examples with their relevant conditions under which they suspend their metabolic activities such as polar bear-hibernation/during winter.
Snails/fishes-aestivation/during summer, some species of zooplankton-diapause, Seeds of higher plants/spores of bacteria/fungi-dormancy/Cyst formation as in case of amoeba.

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