| A | B |
|---|
| Evolution | Gradual change over time |
| Isolation | Complete separation of some members of a species |
| Natural Barrier | Landform that can separate members of a species |
| Threatened | Species that are in danger, but are at the lowest risk of the 3 categories |
| Endangered | Species that are in danger, but are at the second lowest risk of the 3 categories |
| Extinct | Species that have disappeared from Earth and won't return |
| Artificial Selection | When species are bred to obtain a desired trait |
| Natural Selection | Members of a species that are beest adapted survive and reproduce |
| Homologous Structures | Similar body construction that related species have obtained from a common ancestor |
| Niche | A species' role in an ecosystem |
| Biodiversity | The number of different species that live in an area |
| Factors Required for Natural Selection to Occur | Variation, Overproduction, Competition |
| Types of Evidence that Support the Theory of Evolution | Fossils, DNA & Body Structures, Homologous Structures, Simlar Early Stages of Development |
| Factors that Affect Biodiveristy | Area, Climate, Genetic Diversity, Niche Diversity |
