Most Land-Dwelling Invertebrates and All of the Amphibians

Question

Most land-dwelling invertebrates and all of the amphibians
A) are ectothermic organisms with variable body temperatures.
B) alter their metabolic rates to maintain a constant body temperature of 37°C.
C) have a net loss of heat across a moist body surface, even in direct sun.
D) are endotherms but become thermoconformers only when they are in water.
E) become more active when environmental temperatures drop below 15°C.

Accepted Answer

Most land-dwelling invertebrates and all of the amphibians are ectothermic organisms, meaning they do not have internal mechanisms to regulate their body temperature and instead rely on external sources of heat. They have variable body temperatures that fluctuate with changes in their environment.