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Evolution"Nothing in biology makes sense except in the light of evolution."
According to Wikipedia:Evolution is [the] change in the heritable characteristics of biological populations over successive generations. Evolutionary processes give rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules.
Natural Selection is...A mechanism of evolutionary change.
Components of natural selection:Variation in traitsDifferential reproductionTraits must be heritable
AdaptationA genetic trait that confers an advantage and leads to improved fitness and reproduction.
Adaptation vs. AcclimationMimicry
EcholocationOften derives from an adaptation.
Shedding of fur
VariationWithout genetic variation, new traits cannot arise.
Sources of Genetic VariationMutations
Example of Genetic Variation From Sexual Reproduction