| A | B |
| Darwin | On the Origin of Species |
| Mendel | Father of Genetics |
| Natural selection | "Survival of the fittest" |
| Microevolution | Small changes over time |
| Macroevolution | Major changes over time |
| Paleontologist | Scientist that studies fossils |
| Homologous Structure | Similar structures with common ancestry |
| Vestigial structure | Similar structures with decrease in size / not used |
| Gradualism | Gradual changes over time due to speciation |
| Punctuated equilibrium | Dramatic changes over time due to speciation, large periods of time with little or no change |
| Speciation | Creation of a new species |
| Divergence | Accumulation of difference between individuals in a population |
| Isolation | Condition in which two populations of the same species are separated from one another |
| Adaptation | Changes of a species that results in its being better suited to its environment |
| Population | A group within a species |
| Fossil | Preserved material |
| Industrial melanism | darkening of populations over time in response to industrial pollution |