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evolution
| Question | Answer |
|---|---|
| species | A group of organisms whose members successfully reproduce among themselves. |
| evolution | Changes that occur over time in the hereditary features of a species of organisms. |
| natural selection | Darwin’s theory of evolution, states that organisms best adapted to their environment are more likely to survive and pass their traits to their offspring. |
| variation | The occurrence of an inherited trait that makes an individual different from other members of the same species. |
| fossil | Remains of life from an earlier time. |
| relative dating | Estimating the age of a fossil by comparing it to younger fossils in the rock layers above and to older fossils in the rock layers below. |