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21 Cards in this Set
- Front
- Back
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population |
the number of a species in a specific area |
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natural selection |
the process through which animals adapt to survive |
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adaptation |
the process of getting used to something |
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reproductive isolation |
collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring |
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gradualism |
a change that is gradual |
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punctuated equilibrium |
the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change |
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paleontoligist |
the study of fossils |
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vestigial structure |
an organ that has been altered as time goes on |
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homologous structure |
structures derived from a common ancestor |
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divergence |
accumulation of differences between groups |
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speciation |
the process of species evolving to become a distinct species |
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subspecies |
smaller section of organization in classifying organisms |
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taxonomy |
the classification of organisms into systems |
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binomial nomenclature |
two terms are used to denote a species of living organism |
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domain |
highest tax. rank |
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phylogeny |
the branch of biology that deals with phylogenesis (classification) |
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convergent evolution |
organisms evolve structures that have similar (analogous) structures or functions in spite of their evolutionary ancestors |
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analogous character |
able to be compared to another |
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ancestral character |
specific taxon shared with an ancestor |
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derived character |
trait that arose from the most common ancestor |
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cladogram |
a branching diagram showing the cladistic relationship between a number of species |
