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 when they are in water
E) become more active when environmental temperatures drop below 15 °C
Answer: A
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