Question

Unique to endotherms is: a.torpor. b. thermal acclimatization. c. a non changing body temperature. d. response to seasonal temperature changes. e. thermoregulation by a hypothalamus.

Short answer

e. thermoregulation by a hypothalamus

Step-by-step solution

Examine the Options

Each option suggests a different characteristic related to temperature regulation. It's important to understand what each of these terms means. Torpor is a state of reduced metabolic activity, thermal acclimatization is the ability to adjust to changes in environmental temperature, a non changing body temperature implies homeostasis, response to seasonal temperature changes means adjusting to changes in temperature throughout the year, and thermoregulation by a hypothalamus suggests the hypothalamus has a role in maintaining body temperature.

Apply Knowledge of Endotherms

Endotherms are organisms that maintain a constant body temperature regardless of environmental conditions. They achieve this through internal heat production and mechanisms of heat retention.

Identify the Unique Characteristic

Of all options, thermoregulation by a hypothalamus characterizes endotherm behavior. While torpor and thermal acclimatization are exhibited by both endotherms and ectotherms, maintaining a constant body temperature and responding to seasonal temperature changes can also be seen in some ectotherms to a limited extent. Thermoregulation by a hypothalamus, however, is a process unique to endotherms.