Organisms that sometimes regulate their own internal temperature but sometimes allow their temperature to be determined by the environment are called
A) ectotherms.
B) endotherms.
C) varitherms.
D) pyrotherms.
E) heterotherms.

Question

Quizplus · Accepted Answer

Organisms that sometimes regulate their own internal temperature but sometimes allow their temperature to be determined by the environment are called heterotherms. Ectotherms rely on external sources of heat to regulate their temperature, while endotherms rely on internal metabolism to regulate their temperature. Varitherms and pyrotherms are not commonly used terms in biology.

Organisms That Sometimes Regulate Their Own Internal Temperature but Sometimes