| Term | Definition |
|---|---|
| adaptation | a trait or characteristic that helps an organism survive in its environment |
| habitat | the natural environment where an organism lives |
| niche | the role of an organism in its habitat |
| symbiosis | a close, long-lasting relationship between species |
| extinction | the dying out of all the members of a species |
| population | all the member of the same type of organism living in an ecosystem |
| predator | an animal the hunts and eats other animals |
| prey | an animal that is hunted and eaten by a predator |
| endangered species | a species that is close to extinction |
| pollution | the addition of harmful things to the environment |
| threatened species | a species that is close to becoming endangered |
