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Chapter 15
Section 2: Evidence of Evolution
| Term | Definition |
|---|---|
| Fossil | The remains or traces of an organism that died long ago |
| Superposition | Principal that states if the rock strata at a location have no been disturbed, the lowest stratum was formed before the strata above it |
| Relative Age | Its age compared to that of other fossils |
| Absolute Age | Estimate the time since formation of the rock |
| Biogeography | The 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 common ancestor of the species |
| Analogous Structure | Structures that have closely related functions but do not derive from the same ancestral structure |
| Vestigial Structure | Resemble structures with functional roles in related organisms |
| Phylogeny | The relationships by ancestry among groups of organisms |