Chapter16 - Evolution Chapter 16 Darwin and the Evidence...

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1 Chapter 16 Darwin and the Evidence for Evolution Evolution The idea that the creatures on Earth have changed over time and have one common ancestor Charles Darwin 1809-1882 English naturalist First proposed natural selection as the driving force of evolution Voyage of the Beagle 1831-1836 Darwin traveled the world, observing nature and collecting specimens (Published Origin of Species in 1859) The Galapagos Islands Darwin’s most famous stop Group of small islands 600 miles west of Ecuador (South America) Great variety of unique creatures
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2 A variety of finches From island to island, the finches were different sizes and had different beak shapes Darwin’s Later Explanation One finch came from mainland (infrequent event due to isolation) Multiplied, spread to all the islands in the group On each island, food specialization and habitat differences led to altered forms Common Descent with Modification (One of several ideas about nature in Darwin’s time) Living things can be modified
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Chapter16 - Evolution Chapter 16 Darwin and the Evidence...

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