Examples of organisms that suspend their metabolic activities in unfavourable condition. (i) Bacteria, fungi and lower plants They form thick-walled spores, which help them to survive in unfavourable conditions. Spores germinate on return of favourable conditions. (ii) Higher plants Seeds and some other vegetative reproductive structures serve as means to tide over periods of stress. They reduce their metabolic activity and undergo dormancy. (iii) Animals They undergo hibernation or aestivation, if unable to migrate. For example, some snails and fishes. (iv) Zooplanktons They enter diapause (suspended development) under unfavourable conditions.
Some organisms suspend their metabolic activities to survive in unfavourable condition. Explain with the help of any four examples.
Answers
Ashok Kumar
Examples of organisms that suspend their metabolic activities in unfavourable condition.
(i) Bacteria, fungi and lower plants They form thick-walled spores, which help them to survive in unfavourable conditions. Spores germinate on return of favourable conditions.
(ii) Higher plants Seeds and some other vegetative reproductive structures serve as means to tide over periods of stress. They reduce their metabolic activity and undergo dormancy.
(iii) Animals They undergo hibernation or aestivation, if unable to migrate. For example, some snails and fishes.
(iv) Zooplanktons They enter diapause (suspended development) under unfavourable conditions.