Biology Chapter 15 Section 2: Evidence of Evolution – Flashcards
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fossil
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remains or traces of an organism that died long ago
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superposition
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if the rock strata at a location have not been disturbed, the lowest stratum was formed before the strata above it
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relative age
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age compared to that of other fossils
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absolute age
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time since formation -radiometric dating
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transitional species
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species that have features that are intermediate between those of hypothesized ancestors and later descendant species
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biogeography
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study of the locations of organisms around the world
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homologous structures
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anatomical structures that occur in different species and that originated by heredity from a structure in the most recent common ancestor of the species
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analogous structures
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closely related functions but do not derive from the same ancestral structure
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vestigial structures
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seem to serve no function but resemble structures with functional roles in related organisms
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modern synthesis of evolutionary theory
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integration of the theory of natural selection with new understandings of genetics
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phylogeny
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relationships by ancestry among groups of organisms
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embryology
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the study of how organisms develop
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anatomy
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the study of the body structure of organisms
