| Term | Definition |
|---|
| Population | Consists of all living individuals of a species that live together in one place at one time. |
| Natural Selection | By which populations change in response to their environment. |
| Adaptation | The changing of a species that results in its being better suited to its environment. |
| Isolation | In which two populations of the species cannot breed with one another. |
| Extinct | A species that are disappearing permanently. |
| Paleontologists | Scientists who study fossils, can determine the age of fossils fairly accurately by using radiometric dating. |
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