Biology chapter 15
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12 terms
Terms | Definitions |
|---|---|
 evolution | the development of new types of organisms from preexisting types of organisms over time |
| strata | rock layers |
| natural selection | as the mechanism for descent with modification |
| fitness | measure of an individuals hereditary contribution to the next generation |
| fossil | the remains or traces of an organism that died long ago |
| superposition | the rock strata at a location have not been disturbed the lowest stratum was formed before the strata above it |
| relative age | age compared to that of other fossils |
| absolute age | the time since formation |
| phylogeny | the relationships by ancestry among groups of organisms |
| convergent evolution | the process by which different species evolve similar traits |
| divergent evolution | process in which the descendants of a single ancestor diversify into each fit different parts of the environment |
| coevolution | when two or more species have evolved adaptations to each other's influence |
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