| A | B |
| Carolus Linneaus | developed the basis for the classification system we use today |
| genus and species | scientic names are based on these two levels of classification |
| kingdom | level of classification with the most members |
| species | level of classification with the fewest members |
| vertebrates | animals with backbones |
| invertebrates | animals without backbones |
| vascular plants | plants with tubes |
| nonvascular plants | plants without tubes |
| Archaebacteria Kingdom | microscopic organisms with no nucleus and no cell wall |
| Protist Kingdom | microscopic organisms with no cell wall |
| Fungi Kingdom | organisms that absorb food |
| Plant Kingdom | organisms with millions of cells that contain chloroplasts |
| Animal Kingdom | complex organisms with millions of cells with no cell wall |
| Eubacteria Kingdom | microscopic organisms with a cell wall but no nucleus |