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chapter 15 section 2
evidence of evolution
| Term | Definition |
|---|---|
| absolute age | the numeric age of an object or event, often stated in years before the present, an established by an absolutedating process, such as radiometric |
| analogous structure | an anamotical structure in one species that is similar in function and appearance, but not in evolutionary orgin, to another anatomical structure in another species |
| biogeography | the study of geographical distribution of living organisms and fossils on earth |
| homologous structure | anatomical structures in one species that, compared to other anatomical structures in another species, originated from a single anatomical structure in a common ancestor of the two species |
| phylogeny | the evolution history of a species of taxonomic group; the relationships by ansestory among species or other taxonomic groups |
| fossil | the trace of remains of an organism that lived long ago, most commonly preserved in sedimentary rock |
| relative age | the age of an object in relation to the ages of other objects |
| superposition | a principle that states that younger rocks lie above older rocks if the layers have not been distributed |
| vertigial structure | a structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors |
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campbellm19
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