Natural Selection

Natural Selection
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Storyboard Text

  • A population of birds in an environment.
  • A random mutation caused some of the baby birds to be born with gray feathers. Now there is variation in feather color in this population. 
  • Birds continue to survive and reproduce.
  • A large predator hunts the birds.  The green feathered birds blend in to the environment making them better fit.  
  • The green birds survive and reproduce.  The gray birds were less fit for this environment and were killed by the predator.
  • What would happen to the population if there was a drought and the grass died and turned brown?
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