Flashcard Set Preview
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Evolution:
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The production of multiple alleles over time
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Jean Baptist Lamarck
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was a biologist . He believed that evolution occurred, with the mechanism of change being Mutation....
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Charles Darwin
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lived from 1809-1882. At the age of 22, he voyaged on the HMS Beagle for 5 years and observed...
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Alfred Russell Wallace
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Him and Darwin combined to write Origin of Same Species
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Darwin’s most famous book
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The Origin of Species
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Natural Selection
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All the forces in an environment that cause differential reproduction among population members...
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Darwin’s observations of organisms
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All organisms produce more offspring than can survive Populations remain stable in size, and...
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Darwin's deduction
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Individuals compete for resources. The better competitors survive
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Wallace’s observations of organisms
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Organisms phenotypes vary. These variations are heritable
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Wallace’s deduction
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Some phenotypes are better than others at helping individuals compete for resources. Good competitors...
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The three outcomes of natural selection
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Directional: One variant favored, Diversifying: Variants (Extremes) favored over intermediate...
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Evolution in neo-Darwinian terms
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Change in allele frequencies over time
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Fitness
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Organism’s advantageous traits that could help it survive and reproduce more
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Role of the environment in evolution
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If the environment changes, than a previously advantageous trait may no longer be advantageous....
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Adaptation
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Any trait that enhances an individual's ability to survive and reproduce. An internal characteristic
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