Readjustment of an ectotherm's metabolic rate to compensate for seasonal thermal change is caused by the production of different
A) thermogenins.
B) pyrogens.
C) isozymes.
D) countercurrent exchangers.
E) None of the above

Question

Quizplus · Accepted Answer

Isozymes are alternative forms of enzymes that catalyze the same reaction, but differ in their composition and kinetic properties. Ectotherms can produce different isozymes that have different optimal temperatures for their activity, allowing them to adjust their metabolic rate in response to seasonal thermal changes. This helps them to maintain their activity and survive during periods of low temperature or other environmental stressors. Thermogenins and pyrogens are not involved in this process, and countercurrent exchangers are used for other processes such as heat retention.

Readjustment of an Ectotherm's Metabolic Rate to Compensate for Seasonal