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Evolutionary history
the study species over a billion/million of years
| Term | Definition |
|---|---|
| Paleontologist | a scientist who studies fossils in order to understand the ancient history of life on earth |
| species | a group of organisms of the same kind (in line one or more populations) that do not reproduce with organisms from any other groups |
| body structure | a part of an organism (for example, one or more bones) |
| shared structure | a body structure in two or more species that features the same parts (for example, the same bones) |
| Evolution | the process by which species adapt to environmental changes over a very long time |
| descendant species | a more recent species that evolved from an ancestor population |
| common ancestor population | an older population from which two or more newer species descended |
| stability | when something stays mostly the same over time |
| speciation | the process by which one population evolves into two or more different species |
| evolutionary time | the very long time that spans the history of earth, from the vary first cellular life t the present. |
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