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Chapter 15

Section 2: Evidence of Evolution

TermDefinition
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
Created by: McLeanE18