| A | B |
|---|
| Adaptations | A trait that helps an organism survive and reproduce |
| Competition | When two organisms must fight for limited resources such as food |
| Darwin | The naturalist that traveled by ship and made observations of many species of finches and developed the theory of natural selection |
| Fossils | Remains of extinct organisms that have been preserved in rocks |
| Galapagos | Islands in the Pacific Ocean that have many unique organisms |
| Natural Selection | The process by which individuals that are better able to adapt to their environment are more likely to survive and reproduce |
| Overproduction | Production of more offspring than will be able to survive and reproduce |
| Species | Very similar organisms that are able to mate and produce fertile offspring |
| Theory | A well-tested scientific concept that explains a wide range of observations |
| Variations | A difference between individuals of the same species |
