| A | B |
|---|
| endotherm | An animal whose body regulates its own temperature by controlling the internal heat it produces. |
| ectotherm | An animal whose body does not produce much internal heat and whose temperature changes with the environment. |
| niche | The role of an organism in its habitat, or how it makes its living. |
| predation | An interaction in which one organism kills another for food. |
| predator | The organism that does the killing in a predation interaction. |
| prey | An organism that is killed and eaten by another organism. |
| Animals that are endotherms | mammals and birds |
| Animals that are ectotherms | reptiles, amphibians, and fish |
