Question

Generally, bears avoid winter by undergoing

• A. Migration
• B. Diapause
• C. Hibernation
• D. Aestivation

Answer 1

The Correct Option is C

• Hibernation is a state of inactivity and metabolic depression in endotherms (warm-blooded animals) during cold weather, typically in winter. Bears are known to undergo hibernation during the winter months to conserve energy when food is scarce and environmental conditions are harsh. During hibernation, bears enter a deep sleep-like state where their metabolic rate decreases significantly, allowing them to survive without eating for an extended period of time.
• Migration involves animals moving from one region to another, usually in response to seasonal changes in climate or food availability. However, bears do not migrate; they hibernate instead.
• Diapause is a period of dormancy in insects, during which development is temporarily halted. It is not applicable to bears.
• Aestivation is a similar state of dormancy but typically occurs during hot, dry periods (like in deserts), not in winter. Bears do not undergo aestivation.

The correct answer is (C) : Hibernation.

Answer 2

The correct answer is: (C) Hibernation.

Bears, like many other animals, undergo a physiological process called hibernation to survive the harsh winter months when food is scarce and environmental conditions are tough. During hibernation, bears enter a state of reduced metabolic activity, significantly lowering their body temperature, heart rate, and overall energy expenditure.

Hibernation allows bears to conserve energy by relying on their body fat stores instead of actively searching for food. Unlike true hibernators, bears do not experience a complete drop in body temperature, but they still undergo a period of dormancy, where they remain inactive for extended periods of time, often several months, during the winter season.

Thus, hibernation is the key strategy that allows bears to survive the winter when food availability is low and temperatures are extreme.