| A | B |
| classification | the grouping of things according to similarities |
| taxonomy | the study of the way living things are classified |
| organism | living thing |
| binomial nomenclature | the naming system for the classification of living things; fancy way of saying "2 name naming system" |
| genus | the 2nd most specific level of classification; contains organisms who are similar and closely related |
| species | most specific level of classification; members can mate and produce offspring who can also mate and reproduce |
| domain | broadest level of classification |
| prokaryote | organisms whose cells do NOT have a nucleus |
| eukaryote | organisms whose cells DO have a nucleus |
| unicellular | one celled; that one cell does all of the work for the organism |
| multicellular | many-celled; an organism whose many cells specialize on their duties |
| autotroph | "self-feeders"; organisms who produce their own food |
| heterotroph | "other feeders"; organisms who rely on other organisms for food |
| Carolus Linnaeus | Swedish naturalist who began classifying organisms using binomial nomenclature in the 1750's |
| bacteria | domain of organisms who are unicellular prokaryotes and can be found just about anywhere (some helpful/some harmful) |
| eukarya | domain of oragnisms who have nuclei in their cells |
| archaea | domain of oragnisms who are unicellular prokaryotes and are named because of the extreme and hostile environments in which they live |
| protists | the "odds and ends" kingdom of eukarya |
| fungi | the kingdom of eukarya that contains both uni- and multicellular organisms that absorb their food from dead or decaying organisms |
| plants | the only kingdom of eukarya with ONLY autotrophs |
| animals | the kingdom of eukarya with ONLY multicellular heterotrophs |