| A | B |
| morphology | the structure and form of an organism or one of its parts |
| classification | the grouping of objects or organisms based on a set of criteria |
| taxonomy | a discipline of biology primarily concerned with identifying, naming, and classifying species based on natural relationships |
| binomial nomenclature | gives each species a scientific name has two parts; the first part is the genus name and the second part is the specific epithet, or specific name that identifies the species |
| taxon | A named group of organisms |
| genus | Defined as a group of species that are closely related and share a common ancestor |
| family | consists of similar, related genera |
| order | contains related families |
| class | contains related orders |
| phylum | contains related classes |
| division | contains related classes for the classification of bacteria and plants |
| kingdom | the taxon composed of related phyla or divisions |
| domain | the broadest of all the taxa and contains one or more kingdoms |
| systematics | the study of biological diversity with an emphasis on evolutionary history |
| dichotomous key | a key based on a series of choices between alternate characteristics |