Organisms that depend largely on external sources of heat to maintain body temperature are called
A) homeotherms.
B) endotherms.
C) heterotherms.
D) poikilotherms.
E) mesotherms.

Question

Quizplus · Accepted Answer

Organisms that depend largely on external sources of heat to maintain body temperature are called poikilotherms. This includes animals such as reptiles, amphibians, and most fish, which have body temperatures that fluctuate with the environment around them.

Organisms That Depend Largely on External Sources of Heat to Maintain