| Term | Definition |
|---|---|
| Classification | The science of sorting living things into categories. |
| Kingdom | The largest group into which an organism can be classified. |
| Species | The narrowest group an organism can be classified into. |
| Vertebrate | An animal with a backbone. |
| Invertebrate | An animal without a backbone. |
| Vascular | Containing plant tissue through which water and food move. |
| Nonvascluar | Containing no plant tissue through which water and food move. |
