Ectotherms are the animals whose body temperature depends on external environment, such as heated rock surface or sunlight (such as repltiles, fishes, amphibians, and invertebrates).
On the other hand, endotherms are the organisms that can regulate their internal body temperature and it is not dependent on the external sources (such as mammals like human beings).
Match the following animals with the way they regulate their body temperatures. 1. is A 2. is B An endotherm is an animal that is capable of the internal generation of heat (warm-blooded animals), while an ectotherm is an animal that relies on external sources of heat (cold-blooded animals). Hope this helped!
