| A | B |
| the immutability of species | the idea that each individual species on the planet was specially created by God and could never fundamentally change |
| microevolution | the theory that natural selection can, over time, take an organism and transform it into a more specialized species of that organism |
| macroevolution | the hypothesis that the same processes which work in microevolution can, over eons of time, transform an organism into a completely different kind of organism |
| strata | distinct layers of rock |
| fossils | preserved remains of once-living organisms |
| structural homology | the study of similar structures(bones or organs, for example) in different species |
| Lyell | he came up with the idea that the present is the key to the past |
| Darwin | he dispelled the idea of the immutability of the species |