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Darwinian Evolution . What does natural selection suggest?. Darwinian Evolution . What does natural selection suggest? Organisms compete to survive Organisms produce more offspring than those that survive The fittest organisms survive They reproduce and pass on their genes.

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darwinian evolution
Darwinian Evolution
  • What does natural selection suggest?
darwinian evolution1
Darwinian Evolution
  • What does natural selection suggest?
    • Organisms compete to survive
    • Organisms produce more offspring than those that survive
    • The fittest organisms survive
    • They reproduce and pass on their genes
gene pool
Gene Pool
  • Why will it change?
peppered moths
Peppered Moths
  • 1845 Industrial Revolution
selection
Selection
  • Selection may favour one particular allele = an advantageous allele
  • Selection may remove the extremes
  • The Environment has an effect on all genes
  • If the environment changes, the organisms best suited to survive will change
speciation
Speciation
  • Development of a new species
reproductive speciation1
Reproductive Speciation
  • Oestrus
  • Mating Season
  • Anatomical changes
  • Behavioural changes
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