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change over time
| Term | Definition |
|---|---|
| Extinction | This results when a species does not have traits that enable it to survive, so it dies out completely. |
| Fossil | The historical sequence of life found in the layers of the Earth’s crust |
| Mutation | A permanent change in the DNA of an organism that may be helpful, harmful, or have no effect |
| Species | A group of closely related individuals that can mate and create more of the same type of organism |
| Natural Selection | The process in which individuals that are better adapted to their environment survive and reproduce more successfully than others |
| Evidence for Evolution | Different characteristics show up in individuals of a population because they inherit different genes from their parents |
| Evolution | Changes in the inherited characteristics of a species over time |
| Diversity | Members of a population have differences in traits or adaptations |
| adaptation | A characteristic (structure or behavior) that improves an individual’s ability to survive and reproduce in a particular environment |
| Fossil Record | The remains of an organism preserved in rock |
| Variation | Differences in the genetic code create a trait in an organism that is different from others in the species |