Question

Poikilotherms are also known as

• A. Isotherms
• B. Ectotherms
• C. Endotherms
• D. Heterotherms

Answer 1

The correct option is B Ectotherms

Ectotherm and Endotherms are old terminologies to denote animals that cannot maintain a constant body temperature and those that can maintain a constant body temperature by heat produced due to metabolism. Ecto means relying on external sources for the maintenance of body temperature while Endo means relying on internal sources for the same purpose. Heterothermic animals have characteristics of both ecto and endotherms. Isotherm term is not used to describe animals. Poikilotherms are ectotherms.

Thus, the correct answer is option B.