Which is an adaptation used by endotherms, but not by ectotherms, to produce an increase in body temperature?
A) Repeated contraction of flight muscles without movement
B) Cluster or huddling behavior
C) Decreased surface-to-surface contact with a cold environment
D) Circulatory changes to maintain core or internal temperatures greater than the animal's peripheral temperatures
E) Metabolism of brown fat

Question

Quizplus · Accepted Answer

Endotherms, such as mammals, can metabolize brown fat to produce heat, a process known as non-shivering thermogenesis. This is a specific adaptation to increase body temperature that ectotherms, which rely on external heat sources, do not possess.

Which Is an Adaptation Used by Endotherms, but Not by Ectotherms