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chapter 15 section 2

evidence of evolution

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
Created by: campbellm19