| A | B |
|---|
| Theory | a well tested scientific idea |
| natual selection | organisms better able to adapt to their environment survive |
| adaption | trait that enables an organism to survive |
| Charles Darwin | developed the theory of natural selection |
| competition | when two organisms must fight for natural resources |
| species | similiar organisms that are able to mate and produce offspring that can reproduce |
| variations | differences between individuals within a species |
| Glalapagos | Island in the Pacific Ocean visisted by Darwin |
| fossils | remains of extinct organisms that have been preserved in rocks |
| Finches | type of bird studied for beak variations |
| overproduction | production of more offspring than can possibly survive |
