| Answer | Crossword Clue |
|---|---|
| ectotherm | An animal that is dependent on external sources of body heat |
| ectotherms | An animal that is dependent on external sources of body heat |
| endotherms | An animal that is dependent on or capable of the internal generation of heat; a warm-blooded animal |
| endotherm | An animal that is dependent on or capable of the internal generation of heat; a warm-blooded animal |
