Question

Explain by taking three different examples how do certain organisms pull through the adverse conditions when unable in migrate under stressful period.

Answer 1

Hibernation---winter sleep to escape in time e.g., bears. 

Aestivation---summer sleep to avoid heat and desiccation, e.g. snails/fish. 

Diapause---suspended development/activity, e. g. zoo planktons. 

Spore formation---to tide over unfavourable conditions, e.g. fungi/bacteria/lower plants. 

Dormancy---By reducing metabolic activity, e.g. seeds.