| A | B |
|---|
| convergent evolution | evolution toward similar characteristics in unrelated species, resulting from adaptations to similar environmental conditions |
| divergent evolution | evolution of one or more closely related species into different species; resulting from adaptations to different environmental conditions |
| coevolution | process in which two or more species evolve in response to changes in each other |
| extinction | elimination of a species from Earth |
| punctuated equilibrium | theory that states that speciation occurs suddenly and rapidly followed by long periods of little evolutionary change |
| adaptive radiation | process by which one species evolves and gives rise to many descendant species that occupy different ecological niches |
