Question

Animals undergoes inactive stage during winter, is known as

• A. Aestivation
• B. Hibernation
• C. Adaptation
• D. Acclimatization

Answer 1

Answer: (B)

Hibernation

Aestivation is dormant phase of animals wherein their metabolic rate approaches zero, under extreme hot stressful conditions, until arrival of favourable conditions. This makes option A incorrect.

Hibernation is dormant phase of animals when their metabolic rate is zero to combat the stressful cold climate. Thus, option B is correct.

Adaptation is the process of becoming for suitable to existing environmental condition by alteration of structure and/or function of organisms/ its body parts. This makes option C incorrect as animals escape the winters by hibernation, rather than adapting to it.

Physiological adaptation of an organism to attain steady state in a particular climate is referred to as acclimatization. This makes option D incorrect as acclimatization to winter would include maintaining the body temperature by shivering or other physiological processes as occur in warm blooded animals.