| A | B |
|---|
| binomial nomenclature | a system of naming organisms that uses the genus name and a species identifier |
| class | in taxonomy, a group of related orders |
| division | in taxonomy, a grouping of similar classes of plants |
| family | in taxonomy, a group of related genera |
| genus | in taxonomy, a group of similar species |
| kingdom | in taxonomy, a group of similar phyla or divisions |
| order | in taxonomy, a group of similar families |
| phylogeny | the evolutionary history of a species or taxonomic group |
| phylum | in taxonomy, a group of similar classes |
| species | a group of organisms of a single type that are capable of producing fertile offspring in the natural environment |
| species identifier | the second part of a species name; humans are known as the genus name Hoo and by a species identifier sapiens |
| species name | the two-part scientific name of a species composed of the genus and the species indentifier |
| taxonomy | the science of grouping organisms according to their presumed evolutionary relationships |
| phylogenetic tree | a diagram that shows the presumed evolutionary relationships among a group of living things |
| domain | in the three-domain system of classification, one of three broad groups that all living things fall into the basis of rRNA analysis |
| symmetry | a consistent overall pattern of structure |
| radial symmetry | in animals, an arrangement of body parts around a central axis |
| dorsal | the top of a bilaterally symmetrical animal |
| ventral | the bottom of a bilaterally symmetrical animal |
| anterior | the front end of a bilaterally symmetrical organism |
| posterior | the back side of an organism |
| bilateral symmetry | in animals, a body plan in which the left and right sides mirror each other |
| archae | a prokaryotic organism distinguished by other prokaryotes by the composition of the cell membranes and walls |
| eubacteria | the lineage of prokaryotes that include the common bacteria |
