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AP Biology/Unit 8: Ecology
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Endothermic Thermoregulation

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Which of the following is an example of an endotherm, characterized by substantial internal heat generation and stable body temperature regardless of environmental conditions?

TITLE: Comparative Metabolic Rates: #000000

Animal Type Energy Production (J/min) Body Temperature Stability
Endotherm 50 Maintains a constant 3737°C
Ectotherm 10 Varies with ambient conditions
A

An animal with a metabolic rate of 1010 Joules per minute that shows significant temperature fluctuations with the environment, a hallmark of ectothermy.

B

An animal that primarily relies on external heat sources to regulate its body temperature, typical of ectothermic organisms.

C

An animal generating 5050 Joules per minute internally while maintaining a constant body temperature of 3737°C, which exemplifies endothermy.

D

An animal that produces 5050 Joules per minute internally but still experiences large fluctuations in body temperature, contradicting endothermic regulation.

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