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EVIDENCE OF EVOLUTION

EVIDENCE OF EVOLUTION. Fossil Record. Compare the fossils of older rock layers to newer layers to piece together evolutionary history. Evolution of the horse What does the fossil record tell us?. Biogeography. Species living on different continents descended from different ancestors.

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EVIDENCE OF EVOLUTION

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  1. EVIDENCE OF EVOLUTION

  2. Fossil Record • Compare the fossils of older rock layers to newer layers to piece together evolutionary history. • Evolution of the horse • What does the fossil record tell us?

  3. Biogeography • Species living on different continents descended from different ancestors. • If similar ecological conditions, different animals evolve with features in common. • Placentals of N. America • Marsupials of Australia

  4. Biogeography • Sabertooth cat (North America) • Sabertooth marsupial (South America) • http://www.fieldmuseum.org/evolvingplanet/tertiary_16.asp

  5. 1. How do homologous structures show divergent evolution?2. How do analogous structures show convergent evolution?

  6. Vestigial Structure • Nas no function in present-day organism but was useful to an ancestor.

  7. Embryology • What do all vertebrate embryos have in common? • How do these vertebrate embryos change during development?

  8. GENETIC COMPARISON • DNA strands are separated, then placed with a strand of another species. • How can this determine common ancestry?

  9. ADAPTATION Structures, behaviors and internal processes that better suited for survival. Examples: Defense Warning coloration Camouflage

  10. Adaptation • Mimicry • Similar warning colors for different species. • bees & yellowjackets • Species lacking toxic chemicals has adopted the warning coloration. • Monarch & Viceroy butterflies

  11. Which one is poisonous?

  12. What is the adaptation?

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