| A | B |
| taxonomy | the science of classifying organisms according to their shared traits |
| phylogeny | the evolutionary history and relationships of a species |
| binomial nomenclature | a system of naming organisms that uses two names tyo denote genus and species |
| mammals | a class of vertebrates characterized by being warm-blooded, having hair, and producing milk to feed offspring |
| arboreal | describes organisms that live in trees |
| hominid | the family of hominoids that includes humans and their ancestors |
| hominoids | the group of primates that includes humans, their ancestors, and apes |
| bipedalism | the ability to walk upright on two feet |