| A | B |
| natural selection | The Survival of the Fittest. |
| population | A cluster of individuals that are associated with the same species. |
| adaptation | Altering of a species that results in being more suited to the environment. |
| isolation | When two populations with the same species get seperated from one another. |
| microevolution | Change that occurs in a species over time. |
| macroevolution | the change Among species over time. |
| extinct | When a certain species is no longer found. |
| paleontologists | People that study fossils. |
| homologus structures | Structures that share a common ancestory. |
| vestigal structures | Structures that are not necessarily needed. |
| gradualism | Gradual changes over a long period of time; leads to species formation. |
| punctuated equilibrium | Periods of rapid change in a species; seperated by periods of little to no change. |
| industrial melanism | Darkening over time of the populations of organisms. |
| transition species | A species that is the evolutionary stop between two different species. |
| coevolution | Two organisms(different species) evolving together. |
| convergent evolution | The accumulation of similarities between groups. |
| divergent evolution | The accumulation of divergence between groups. |
| reproductive isolation | Organisms that once belonged to the same species but can no longer mate together. Now they belong to different species. |
| balancing selection | Selection that acts in opposite directions. |
| family tree | Shows how organisms are related through evolution. |