| A | B |
|---|
| Assortative Mating | Organisms selectively mate based on common phenotypes |
| Biochemical | Type of evidence dealing with atomic and molecular similarities |
| Biogeography | Study of the distribution of plant and animal species on the planet |
| Bottleneck Effect | Genetic drift in which only a few organisms survive a mass extinction |
| Descent with Modifications (DWM) | Concept that modern species are offspring of ancient species, with new traits |
| Directional Selection | A single extreme phenotype is favored over others |
| Disruptive Selection | Extreme phenotypes are favored over intermediate phenotypes |
| Fitness | The extent to which an organism is likely to reproduce |
| Fossil | Any remnant of an organism from the past that provides details |
| Fossil Record | History of life told through remains from the past |
| Founder Effect | Genetic drift in which organisms with a unique genotype begin a population |
| Gene Flow | The movement of alleles between populations due to migration |
| Gene Frequency | Percentage of times a gene or allele appears in a population |
| Gene Pool | All the alleles for a specific gene within a population |
| Genetic Drift | Changes in allele frequencies due to chance issues in the population |
| Macroevolution | Large scale changes in populations over long periods of time |
| Microevolution | A change in a gene pool over a short period of time |
| Mutation | Any change in DNA sequence |
| Natural Selection | Process of allele frequencies adapting to the needs of their environment |
| Random Mating | Organisms show no choice or preference on who they mate with |
| Speciation | Splitting of one species into two distinct, separate species |
| Stabilizing Selection | An intermediate phenotype is favored over others |
| Vestigial | Similar structures that are functional in one species but not in another |
