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Biology Ch 15.1-2

TermDefinition
artificial selection Darwin's term for the selective breeding of organisms selected for certain traits in order to produce offspring having those traits. 15.1
evolution Hereditary changes in groups of living organisms over time. 15.1
natural selection Theory of evolution developed by Darwin, based on four ideas: excess reproduction, variations, inheritance, and the advantages of specific traits in an environment. 15.1
analogous structure Structure that has the same function but different construction and was not inherited from a common ancestor. 15.2
ancestral trait More-primitive characteristic that appeared in common ancestors. 15.2
biogeography Study of the distribution of plants and animals on Earth. 15.2
camouflage Morphological adaptations that allow organisms to blend into their surroundings. 15.2
derived trait New feature that had not appeared in common ancestors. 15.2
embryo Organism's early prebirth stage of development. 15.2
fitness Measure of a trait's relative contribution to the following generation. 15.2
homologous structure Anatomically similar structure inherited from a common ancestor. 15.2
mimicry Morphological adaptation in which one species evolves to resemble another species for protection or other advantages. 15.2
vestigial structure Reduced form of a functional structure that indicates shared ancestry. 15.2
Created by: smeisman
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