| A | B |
|---|
| Adaptation | Characteristic that has developed that allows an organism to survive in its environment |
| Mutation | Change in the base pairs of DNA |
| Vestigial structure | Remnant of a once useful structure |
| Evolution | Process by which organisms change over time in order to survive and reproduce |
| Fossil | Remains of a once living organism perserved in rock or amber |
| Fossil record | Historical gatherings of all fossils that show how living things came to be |
| Natrual selection | Process by which organisms with favorable traits survive in their environment and reproduce |
| Speciation | Process by which a new species is produced through natural activities |
| Species | All organisms of the exact same kind that can reproduce with each other |
