definition
Relating to or deriving from the metabolism of a living organism:
sentence
Endotherms are animals that maintain a constant body temperature even when environmental temperatures fluctuate. In contrast, the environment regulates the body temperature of ectotherms and thus their metabolic rate tends to be lower than the metabolic rates of endotherms, which must maintain a high, constant body temperature.
difficulty
medium
toefl frequency
2
toefl classification