"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 traits
Traits must be heritable
A genetic trait that confers an advantage and leads to improved fitness and reproduction.
Adaptation vs. Acclimation
Often derives from an adaptation.
Shedding of fur
Without genetic variation, new traits cannot arise.
Sources of Genetic Variation
Example of Genetic Variation From Sexual Reproduction
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