Biology
Grade-8
Easy

Question

During hibernation, animals show which of the following changes?

  1. It lowers its body temperature
  2. It slows down its heartbeat
  3. It lowers its breathing
  4. All of the above

hintHint:

Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It most commonly occurs during winter months.

The correct answer is: All of the above


    When hibernating, an animal's metabolism slows significantly: its heartbeat slows, it breathes more slowly (some animals even stop breathing for periods of over an hour) and its body temperature drops—in some extreme cases to below the freezing point of water (zero degrees Celsius).

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