Term
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Definition
| population changes over successive generations |
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Term
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Definition
| changes that occur affect the frequencies of alleles and therefore the frequncys of inherited traits |
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Term
| what did charles d propose |
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Definition
| Nat selection and sexual selection |
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Term
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Definition
| the "theory of evolution" through acquired characteristics many years before darwin |
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Term
| Observation darwin made on his voyage |
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Definition
there are a lot of diff species and they are all over
extinct organisms are often similar to extant organisms isolated populations may appear slightly dissimilar |
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Term
| observations made by others that were important to darwin |
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Definition
some members of a population have more offspring that others
artificial selection can produce different varieties of species
the earth is very old |
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Term
| the major controversial conclusions of darwins voyage |
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Definition
living organisms were not created in their present form
all organisms are related through evolution
humans share common ancestors with apes |
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Term
| 5 agents that lead to evolution |
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Definition
natural selection
nonrandom selection(sexual) mating
gene flow
gene mutation (drift) |
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Term
| NAtural selection requirements |
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Definition
variation in traits
inheritance of traits
differential adaptaion (some traits are more adapted tot he environment than others)
differential reproduction (those best adapted tot he environment have more offspring than those less adapted) |
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Term
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Definition
| equals productive output-relates to adaption |
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Term
| categories of nat selection |
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Definition
directional-nat sel favors extreme trait level
Stabilizing-nat sel favors intermediate trait level
disruptive-nal sel favors two diff phenotypes |
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Definition
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