alleryStart learning →An animal hibernates through a cold winter. Which state has it entered?
AEstivation, with a raised heart rate
BTorpor, with a lowered metabolic rate
CMigration, with a lowered body mass
DDormancy, with a raised metabolic rate
Answer & Solution
Correct answer: B. Torpor, with a lowered metabolic rate
1. Hibernation lets an animal sit out cold conditions instead of fleeing them.
2. The state it enters is called torpor.
3. In torpor the metabolic rate drops sharply, so the animal spends far less energy.
4. Estivation is the same trick used against hot and dry conditions rather than cold.
5. Migration means moving somewhere else, which is a different strategy altogether.
_Source: OpenStax Biology 1e (CC BY 4.0), Chs 44 and 46, section 44.2 Biogeography_
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