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Darwin’s Finches

Darwin’s Finches. Evolution in Action. While in the Galapagos…. Darwin noticed small birds with very similar features. Size (15-20 cm) Color (brownish/blackish) He also noticed differences in birds based on their location in the islands. Beak Size Mating Behaviors Song Melodies.

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Darwin’s Finches

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  1. Darwin’s Finches Evolution in Action

  2. While in the Galapagos… • Darwin noticed small birds with very similar features. • Size (15-20 cm) • Color (brownish/blackish) • He also noticed differences in birds based on their location in the islands. • Beak Size • Mating Behaviors • Song Melodies

  3. Why are they different?!? • Resources were different in various parts of the Islands. • In certain locations, certain Finches with a specific variation were at a bigger “advantage” • These Finches won the “struggle for existence” and those without the advantage died off. • Overtime, only those with the advantage were left. This accounts for the differences in various parts of the Islands.

  4. Evidence of Evolution in 2010

  5. Discovery of Genes • Genetic research began soon after Darwin’s “Origin of the Species” was published. • Comparisons of DNA and proteins of different species indicate the degree to which those species are related.

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