Frogs and Natural Selection
Updated: 12/17/2019
Frogs and Natural Selection
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Storyboard Text

  • Leaf's Legs
  • Mating
  • Leaf Prevails
  • Frogs in a swamp have different lengths of legs. (Long-legged frogs are represented by green, short-legged frogs are represented by brown.) Leaf the frog is green and has long legs.
  • After 5 years
  • Eventually, Leaf mates with a frog lady who has long legs just like his. His babies also have similar leg lengths
  • After 10 years
  • Leaf's friends, who have short legs, are not as fast as him and his children. They get eaten more often by predators than frogs like Leaf who are long-legged.
  • After 15 years
  • 5 years after Leaf mates, he watches his offspring and other frogs like him that have long legs survive more often.
  • 10 years later, Leaf's children see even more long-legged frogs survive. There are more long-legged frogs to mate with, so they continue to increase in frequency.
  • After 15 years, Leaf's grandchildren see that nearly all of the short-legged frogs are disappearing. The elderly Leaf tells them about how he was able to survive because of his long legs.
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