Evolution Natural Selection

Evolution Natural Selection
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Storyboard Text

  • Before, some birds had hollow bones and some birds had solid bones. 
  • The birds with hollow wings were able to fly, but the birds with solid bones weren't able to fly because their bones are too heavy.
  • The birds that are able to fly are able to hunt for food and escape from predators easily.
  • The birds that are unable to fly die off because they have no access to resources and are easy prey for predators.
  • The birds that have survived reproduce baby birds that also have hollow bones. 
  • Eventually the entire population consists of hollow - boned birds. 
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