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20 Cards in this Set
- Front
- Back
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artificial selection |
the process of directed breeding tp produce offspring with desired traits |
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natural selection |
those less equiped will die |
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evolution |
cumulative changes in groups of organisms through time |
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derived traits |
newly evolved features |
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ancestral traits |
primative features |
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homologous structures |
anatomically similar structures inherited from a common ancestor |
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vestigial structures |
structures that are reduced forms of functional structures in other organisms |
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analogous structures |
superficially similar in construction but are not inherited from a common ancestor |
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embryo |
pre-birth stage in an organism's development |
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biogeography |
distribution of plants and animals around the world |
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fitness |
a measure of relative contribution an individual trait makes it to the next generation |
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camoflouge |
morphological adaptations that help an animal blend in |
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mimicry |
evolves to resemble other species |
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hardy-weinberg principle |
when allelic frequencies stay constant |
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genetic drift |
any change in allelic frequencies in a population that is due to chance |
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founder effect |
can occur when a small sample of population settles in a location separate from the rest |
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bottleneck |
when a population declines to a very low number and then rebounds |
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stabilizing selection |
the most common form of natural selection |
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directional selection |
if an extreme version of a trait makes an organism more fit |
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disruptive selection |
a process that splits a population into two groups |
