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Organisms and Populations — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations3 Marks
Question
Explain with the help of suitable examples the three different ways by which organisms overcome their stressful conditions lasting for short duration.
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Answer

Organisms either migrate or suspend their metabolic activities, when conditions are stressful for short duration' Some examples of response of organisms condition are as follows-
  1. Moving away from stressful habitat to more favourable area and return to their habitat when stressftrl period is over, e.g. birds from Siberia and other cold countries migrate-to Bharatpur Sanctuary of Rajasthan in winters'
  2. Hibernating (frogs) or aestivating (snails) or undergo diapause (zooplanktons).
  3. Thick-walled spores ate formed in stressful conditions and germinate under Suitable conditions, e.g. bacteria, fungi and lower groups of plants.

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