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Charles Darwin and Evolutionary Theory: A Journey of Discovery

Explore Darwin's epic journey of discovery and his theory of evolution through natural selection. Learn about common ancestry, evidence for evolution, and the impact of influential figures on Darwin's ideas. Discover the science behind evolution and the interconnectedness of all species on Earth.

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Charles Darwin and Evolutionary Theory: A Journey of Discovery

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  1. Chapter 16 Darwin’s Theory of Evolution

  2. 16.1 – Darwin’s epic Journey • Scientific views of the natural world were changing • Darwin 2/12/1809 • Was the earth older? • Had it changed? • Evolution – change over time (natural selection) • Common ancestors

  3. 16.1 – Darwin’s epic Journey • Started voyage in 1831 • Naturalist • Collect and measure specimens of plants and animals • Fossil • Artificial Selection Master and Commander Of the Far Side of the World

  4. 16.3 Darwin presents his case • Evolution by Natural Selection • 16.2 People that influenced Darwin • Remember that Darwin lived in a skeptical age • Many of his ideas…..well • The Struggle for Existence • Variation and Adaptation • Survival of the Fittest • Fitness • Natural Selection – See Fig. 16-10

  5. 16.3 Darwin presents his case • Common Descent • All species, living and extinct are descended from ancient common ancestors

  6. 16.4 Evidence of Evolution • Biogeography • Where organisms lived now and where they and their ancestors lived in the past. • Closely related but different • Distantly related but similar • Different ancestors

  7. 16.4 Evidence for Evolution • The Age of the Earth and Fossils • Determining the earth’s age • Gaps • The Age of the Earth • Radioactive Dating • Issues • Recent Fossil Finds • Trace modern to ancient

  8. 16.4 Evidence for Evolution • Comparing Anatomy and Embryology • Homologous Structures • Can be plants or animals • Similar build, different function • Very similar = common ancestor • Vestigial Structures • Inherited but minimal if any function

  9. 16.4 Evidence for Evolution • Embryology • Study the embryo including its structure • Similar =? Common ancestor. • Remember Hox Genes? • Genetics and Molecular Biology • DNA the strongest evidence? • Remember that the basis of DNA is the same in us all.

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