holly patterson

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  • Up Next on Darwin theory's
  • It is not the strongest of the species that survive.
  • Hmm.. These finches look a lot like the ones on the other island!
  • Charles Robert Darwin discusses his book, leading up to his theory, and his take on evolution!
  • Seeds- round, dull beak Insects- sharp, narrow beak Leaves- dull, thin beak Buds/fruit- round, dull beak Tool using- round Grubs- long, sharp beak
  • Beak Structure
  • In Darwin's book, On the Origin of Species, he gathered evidence to support evolution and offered natural selection to go along with this theory.
  • Over Production: -More offspring are produced than what can survive. Struggle for Existence: -Organisms of the same and different species will compete for limited resources to survive. Variation: -No two members of a species are exactly alike. -The variations are the results of random mutation. Origin of a New Species: -The accumulation of the inherited variations will lead to the creation of a new species. Survival of the Fittest: -Those without a needed trait will die off.
  • But before his theory was set in stone, Charles Darwin spent time in the Galapagos Islands, finding evidence to support it. Especially focusing on Finches, a type of bird on many of the islands.
  • That's all for now! Tune in next week for Lamarck's side of Evolution!
  • He would later base some of his thoughts from the supposing that these finches were all descendants of the same lineage. He decided that evolution does not happen according to any predetermined plan.
  • Some of Darwin's discoveries were: Organisms evolve over time, different organisms evolved from a common ancestor, species multiply over time, and evolution happens through the change of populations.
  • By holly patterson!
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