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The Evidence For Evolution

The Evidence For Evolution. Artificial Selection . Artificial Selection . Wild-type vs. Domesticated Corn. Artificial Selection . Artificial Selection . Russian geneticist Dmitry K. Belyaev . Artificial Selection . Piebald coat color in dometsicated animals and foxes. After 8 – 10

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The Evidence For Evolution

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  1. The Evidence For Evolution

  2. Artificial Selection

  3. Artificial Selection Wild-type vs. Domesticated Corn

  4. Artificial Selection

  5. Artificial Selection Russian geneticist Dmitry K. Belyaev

  6. Artificial Selection

  7. Piebald coat color in dometsicated animals and foxes

  8. After 8 – 10 • generations: • Changes in coat color • Floppy ears • Rolled tails • After 15 – 20 generations: • Foxes with shorter tails and legs • Underbites / overbites • Barking!

  9. How is artificial selection evidence for evolution?

  10. Absolute (Radiometric) Dating = based on principle that isotopes decay to daughter isotopes at a constant rate The Fossil Record Half-Life = time required for 50% of parent isotope to decay

  11. Absolute (Radiometric) Dating = based on principle that isotopes decay to daughter isotopes at a constant rate The Fossil Record Half-Life = time required for 50% of parent isotope to decay

  12. Your measurements indicate that a fossilized skull you unearthed only contains about 1/16th the carbon-14 of the skulls of present-day animals. What is the approximate age of the fossilized skull? Try It!

  13. Relative Dating

  14. Relative Dating KT Iridium Layer – Italy KT Iridium Layer – Newfoundland

  15. Try It!

  16. Extinct Organisms

  17. Transitional Forms

  18. How is the fossil record evidence for evolution?

  19. Morphological Homology – Anatomical Mammalian forelimbs

  20. How are homologous structures evidence for evolution?

  21. Vestigial Structures Vestigial Bones in Snake and Human

  22. Vestigial Structures Python with vestigial appendage

  23. How are vestigial structures evidence for evolution?

  24. “How far more interesting does out study become when we regard every production of nature as one which has a history” – Darwin, 1859 Blind Salamander Flightless Kiwi

  25. Why? Seems Odd? QWERTY Key Arrangement

  26. At least as good, possibly better. Why don’t we use it? DVORAK Key Arrangement

  27. “Evolution is like modifying a machine while it’s running” – Karl Liem

  28. Don’t Be Fooled By Analogous Structures! What do they tell us about?

  29. Homology or Analogy? Porcupine’s Quills and Cactus’s Spines Cat’s Paw and Human Hand Owl’s Wing and Hornet’s Wing

  30. Developmental Homologies Match and Order the Embryos!

  31. Developmental Homologies

  32. “Ontology Recapitulates Phylogeny”

  33. Molecular Homology 7% 1.2% 1.6% 3.1%

  34. Molecular Homology

  35. In all living things…

  36. Biogeography

  37. WE CAN SEE IT HAPPEN!

  38. Piecing Together the Evolution of Whales What are the different types of evidence that were used?

  39. “Internal Consistency”

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