Natural selection


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  • Principle #1 Genetic Variation  The genetic variation within the seal population is seals with white skin and seals with grey skin 
  • Principle #2 Overproduction & the struggle of survival  Overproduction: Each female seal produces two grey baby seals  Struggle of survival: Between the grey and white seals only the white seals survive because the grey ones easily stand out to the polar bear.
  • Principle #3 Differential survival and reproduction  The ones that survived and where able to reproduce was the white ones because they were able to camouflage and no get eaten by the polar bears
  • Principle #4 Changes in Gene Pool The white seal where able to survive and reproduce so along the years they were able to increase their population. 
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