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| the development of new types of organisms from preexisting types of organisms over time |
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| mechanism for descent with modification |
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| measure of an individuals hereditary contribution to the next generation |
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| the remains of an organism that died long ago |
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| if the rock strata at a location have not been disturbed the lowest stratum was formed before the strata above it |
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| its age compared to that of other fossils |
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| study of the location of organisms around the world |
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| anatomical structures that occur in different species and that originated by heredity from a structure in the most recent common ancestor of the species |
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| closely related functions but do not derive from the same ancestral structure |
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| serve no fuctions but that resemble structures with functional roles in related organisms |
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| the relationships by ancestory among groups of organisms |
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| the process by which different species evolve similar traits |
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| when the descendants of a single ancestor diversity into specis that each fit different parts of the environment |
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| when a human breeder chooses individuals that will parent the next generation |
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| when 2 or more species have evolved adaptations to each pothers influences the situation |
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| a trait that makes an organism succesful in its environment |
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