Question

1. which term best describes an organism that is cold - blooded?

a. ectotherm
b. exotherm
c. endotherm

Explanation:

To determine the term for a cold - blooded organism, we analyze the options:

• Option a: Ectotherm. Ectotherms are organisms that rely on external sources to regulate their body temperature, which is the definition of cold - blooded organisms.
• Option b: Exotherm is not the correct term for cold - blooded organisms (exothermic reactions release heat, but this is not related to organismal thermoregulation in this context).
• Option c: Endotherm refers to warm - blooded organisms that generate heat internally to maintain a constant body temperature.

Answer:

a. ectotherm