Ncert Exercises & Solutions

3. Most living organisms cannot survive at temperature above 450C. How are some microbes able to live in habitats with temperatures exceeding 1000C?

Phenotypic adaptation involves changes in the body of an organism in response

to genetic mutation or certain environmental changes. These responsive

adjustments occur in an organism in order to cope with environmental conditions

present in their natural habitats. For example, desert plants have thick cuticles and

sunken stomata on the surface of their leaves to prevent transpiration. Similarly,

elephants have long ears that act as thermoregulators.