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Natural Selection
Updated: 8/2/2020
Natural Selection
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Storyboard Text

  • White and grey peppered moths lived on the white trunks of trees in forests in London.
  • The dark coloured moths were less common as they stood out against the light tree trunks which made them easy prey for birds.
  • The birds began eating the white peppered moths as they were easier to spot.
  • Due to the white peppered moths being eaten more frequently, the black ones began reproducing resulting in majority of the population being dark coloured.
  • During this time in London was the start of the Industrial Revolution, and many new factories were being built. The pollution produced by these factories began to darken the tree trunks.
  • The darkening of the tree trunks caused the white peppered moths to stand out and the black ones to blend in.
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