| A | B |
|---|
| Change over time, the process by which modern organisms have descended from ancient organisms | Evolution |
| Preserved remains of ancient organisms | Fossils |
| Humans using breeding to get desired traits in organisms | Artificial Selection |
| The ability of an individual to survive and reproduce in its specific environment | Fitness |
| Random change in allele frequency, often occurs more in small populations | Genetic Drift |
| Structures that have different mature forms but develop from the same embryonic tissues | Homologous Structure |
| All the genes, all of the different alleles, that are present in a population | Gene Pool |
| Term for when Organisms that are better suited to their environment survive and reproduce most successfully | Survival of the fittest |
| A trait controlled by a single gene with 2 alleles | Single Gene Trait |
| Allele frequencies remain constant | Genetic Equilibrium |
| Any inherited characteristic that increases an organism's chance of survival | Adaptation |
| The formation of a new species. Organisms are unable to produce offspring with each other | Speciation |
| Organs with little or no function | Vestigial Organ |
| Two populations are separated by geological barriers and cannot reproduce, EG. Rivers, mountains, dessert | Geographic Isolation |
| Structures which look alike and do the same job in adult organisms, but develop from different regions in the embryo | Analogous Structure |
| Individuals at the higher and lower ends of the curve have a higher fitness than individuals in the middle | Disruptive Selection |
| Wrote Origin of Species, Spent 5 years on the HMS Beagle, Credited with the Theory of Evolution | Charles Darwin |
| Individuals in the middle of the curve have higher fitness | Stabalizing Selection |
| Trait such as skin color, hair color that has more than 2 alleles, many different genes control it | Polygenic Trait |
| Survival of the fittest | Natural Selection |
