| A | B |
|---|
| Natural Selection | the environment chooses favorable traits |
| Artificial Selection | humans select favorable traits |
| Fitness | measure of survival ability |
| Fossil Record | tracking evidence of life through layers of rock |
| Adaptation | trait that allows an organism to do better |
| Adaptive Radiation | Evolution of many species from one common ancestor |
| Homologous Structures | put together similarly but different function |
| Analogous Structures | put together differently but same function |
| Vestigial Structures | Structures that no longer serve a purpose |
| Biogeography | tracking how species are distributed |
| Comparative Embryology | tracking the different stages of development |
