Evolution Notes.

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Presentation transcript:

Evolution Notes

Natural Selection – survival of the fittest Variation happens naturally and is inherited Nature selects which traits are best suited for the environment

3 Requirements for Natural Selection to Occur Population needs to be limited in order to create competition

Genetic Variation Must Exist

Variations must affect reproductive success

Adaptations In order to create genetic variation, adaptations must occur Adaptations are inherited characteristics that increase an organism’s chance of survival Genetic variation or adaptations can occur because of 1. mutations or 2. genetic shuffling through recombination or meiosis