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Unknown Story
Updated: 3/11/2020
Unknown Story
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Storyboard Text

  • A population of lizards lives in a rocky area. There are some small variations, but overall the population is light-colored, and this is the favorable trait because they blend in with the rocks well.
  • One day, there is an eruption from a nearby volcano, leaving the rocks covered in ash and therefore darker. Now the birds (predators of the lizards) can easily see and hunt the light-colored ones.
  • The birds are now able to see the light-colored lizards more easily and so eat them. One day, there are some lizards born with a darker-colored skin.
  • These lizards with the dark color adaptation are able to survive more because their dark skin can blend in with the darker rock, so the birds cannot see them as easily.
  • The dark-colored lizards are able to survive because they are being hunted less, so they can reproduce and pass on the beneficial gene to their offspring.
  • Now the majority of the population has the beneficial gene, being dark-colored.
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