Animals such as fish and reptiles, whose body temperature changes with the environment, are called

  • A. endotherms
  • B. homeotherms
  • C. warm blooded animals
  • D. ectotherms

Explanation

Ectotherms gain heat from outside sources and so track ambient temperature, whereas endotherms generate their own heat metabolically. Cold blooded is the older term for the same idea.

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