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Chapter 15-2.

vocabulary

TermDefinition
fossil remains or traces of an organism that died long ago
superposition states that if a rock strata at a location has not been disturbed the lowest stratum was formed before the stratum above it
relative age age compared to other fossils
absolute age the time since formation
biogeography study of the locations of organisms around the world
homologous structure anatomical structures that occur in different species and that originated by heredity from a structure in the most recent comman ancestor
analogous structure have closely related functions but do not derive from the same anscerial structure
vestigial structure seem to serve no function but resemble structures with functions in related organisms
phylogeny relationships by ancestry among groups of organisms
Created by: mccuddenm16
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