| A | B |
|---|
| evolution | the historical development of a group of organisms |
| phylogeny | the evolutionary history of a species |
| character | inherited feature that varies among species |
| molecular clock | a model that is used to compare DNA sequences from two different species to estimate how long the species have been evolving since they diverged from a common ancestor. |
| cladistics | a method that classifies organisms according to the order that they diverged from a common ancestor |
| cladogram | a branching diagram that represents the proposed phylogeny or evolutionary history of a species or group |
| analogous structure | structures that have the same function but different underlying construction |
| homologous structure | structures that may perform different functions but show an anatomical similarity inherited from a common ancestor |
