Which of the Following Does Not Describe the Limits of the Thermoneutral

Question

Which of the following does not describe the limits of the thermoneutral zone in a homeotherm?
A) The range of environmental temperatures at which minimal levels of energy are spent on thermoregulation
B) The range of environmental temperatures over which an organism exhibits a basal metabolic rate
C) The range of body temperatures at which the metabolic rate is maximum
D) The range of environmental temperatures over which an organism's metabolic rate does not increase for thermoregulation
E) The range of external temperatures over which an animal's metabolic rate is minimal

Accepted Answer

The thermoneutral zone is defined as the range of environmental temperatures in which an organism's metabolic rate remains constant, meaning it does not increase for thermoregulation. Choice C describes the range of body temperatures at which metabolic rate is maximum, which is outside the thermoneutral zone. Choices A, B, D, and E all accurately describe aspects of the thermoneutral zone.