| A | B |
|---|
| Adaptive radiation | Formation of new different species from a common ancestor due to different environments |
| Analogous structures | Characteristic in two species that is similar in function but from different ancestor |
| Convergent evolution | Different species evolve similar characteristics because of similar environments |
| Divergent evolution | Once related populations evolve separately as a result of geographic isolation |
| Genetic drift | Accidental change in genes in small populations due to chance |
| Genetic equilibrium | Constant allele frequency in a population over generations |
| Gradualism | Small genetic changes are made in a population over time |
| Homologous structures | Similar function of structures that are inherited from a common ancestor |
| Punctuated equilibrium | Species that are stable for a long time then have a short period of rapid genetic change |
| Vestigial structures | Structure or characteristic that has not been used for a long time but has similar structures in other organisms from common ancestor |
