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27 Cards in this Set
- Front
- Back
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warning coloration
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the colors of the animal actually make it easier to see
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Gradualism
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Darwin's theory of evo. in which new species arise through gradual changes
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reproductive isolation
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the loss of the ability to interbreed by two isolated groups
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Synthetic Theory
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A modern theory of evolution stating that populations evolve, rather than the indivisuals within populations
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adaptive radiation
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the process by which a species evolves into a number of different species, each occupying a new environment
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Adaptations
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Any kind of inherited trait that improves the chances of survival and reproduction for an organism
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directional selection
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one type of natural selection, in which an extreme phenotype becomes a favorable adaption
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Variations
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Characteristics in indivisual that differ from typical characteristics of other indivisuals in the same species
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genetic drift
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a change in the gene pool of a small population that is brought about by chance
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Natural Selection
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The process whereby organisms with favorable variations survive and produce more offspring than less well adapted organisms
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industrial melanism
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the development of dark-colored organisms in a population exposed to industrial air pollution
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Population
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The simplest groupings of organisms in nature
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disruptive selection
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two opposite phenotypes are favorable adaptions, while the average phenotypes are unfavorable
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genetic recombination
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The formation of a new combinations of allels during sexual reproduction
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stabilizing selection
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sometimes, the average phenoltype may be a favorable adaptions, and extremely phenotypes are unfavorable
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punctuated equilibrium
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The theory of evolution stating that a species remains the same for a long time
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mimicry
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one organism is protected from its enemies by its resemblance to another species
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speciation
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The formation of new species
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convergent evolution
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natural selection that causes unrelated species to resemble one another
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gene pool
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The total of the alles in a population
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genetic equilibrium
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The condition in which allele frequencies do not change from one generation to the next
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geographic isolation
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occurs when a population is divided by a natural barrier, such as a mountain desert, river or other body or water, or a landslide
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coevolution
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two or more species also can evolve in response to each other through cooperative or competitive adaptions
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Hardy-Weinberg las
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sexual reproduction alone does not affect genetic equilibrium
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mimicry
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one organism is protected from its enemies by its resemblance to another species
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camouflage
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the organism blends into the environment
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range
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each species is found in a particular region of the earth. This regions is calle the species' range
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