An ectotherm's metabolism adjusts to compensate for seasonal thermal changes.This is most likely made possible by the production of different
A) thermogenins.
B) thermoneutral zones.
C) isozymes with temperature optima matching the season.
D) countercurrent exchangers.
E) kinds of adipose tissue.

Question

Quizplus · Accepted Answer

Isozymes with temperature optima matching the season would allow an ectotherm's metabolism to adjust to compensate for seasonal thermal changes. This means that different forms of enzymes would be used in different seasons, allowing for optimal metabolic activity at different temperatures.

Answer: A, E
 Thermogenins and adipose tissue are more likely to be associated with endotherms, or warm-blooded animals, as they play a role in generating and conserving body heat. Countercurrent exchangers are also more commonly found in endotherms. Thermoneutral zones are the range of temperatures at which an animal does not need to expend energy to maintain its body temperature, and while this is relevant for ectotherms, it does not directly relate to how their metabolism adjusts to seasonal temperature changes.

An Ectotherm's Metabolism Adjusts to Compensate for Seasonal Thermal Changes