| A | B |
| Structure | The arrangement of parts on an organism or an object. |
| Function | The activity of each part in an organism. |
| Genus | A group of similar species |
| Species | A group of organisms that are very closely related. They can mate and have offspring that are fertile. |
| Domain | The highest level of classification representing the largest differences among groups. |
| Bacteria | A domain of prokaryotes that usually have a cell wall and reproduce by division. |
| Archaea | A domain of prokaryotes that live in harsh environments, the open ocean and soil. |
| Eukarya | A domain made up of organisms whose cells contain a nucleus. |
| Animalia | Kingdom of multicellular organisms that lack cell walls, are usually able to move around, and have specialized sense organs. |
| Dichotomous Key | An identification tool that uses a series of paired statements to identify organisms. |
| Plantae | Kingdom of multicellular organisms that have cell walls, cannot move around, and make their own food. |
| Protista | Kingdom of single or multi-cellular organisms with plant like, animal like or fungus like characteristics. |
| Fungi | Kingdom of single or multi-cellular organisms that get their energy by absorbing materials and have cell walls but NO chloroplasts. |
| Binomial Nomenclature | A system used to name organisms using two words: the genus name and the species name |