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Evo evidence 16_4_1

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Evo evidence 16_4_1

  1. 1. Evidence of EvolutionBiogeography, Geology, and the Fossil Record
  2. 2. BiogeographyThe study of where organisms live now and where they andtheir ancestors lived in the past.
  3. 3. Families have characteristicsFamilies have characteristicsBoth on the outside and the inside...Canidae - Dog FamilyYou can tell apart the different families (even species) ofmammals by their skulls - how the bones are arranged andshaped, and the types of teeth they have.
  4. 4. Patterns tell us storiesPatterns tell us storiesCamel FamilyCamel FamilyEvolution &Evolution &DistributionDistribution50 million year oldcamel ancestorSouth Dakota
  5. 5. Patterns tell us storiesPatterns tell us storiesCamel FamilyCamel FamilyEvolution &Evolution &DistributionDistribution50 million year oldcamel ancestorSouth Dakota
  6. 6. Closely Related but DifferentClosely Related but DifferentOne of themostcommonsalamandersin Oregon -EnsatinaeschscholtziiHangs-out in wet leaves, old logs,wood piles, and eats bugs....
  7. 7. Ensatina eschscholtziiThe Oregon subspecies has the largestrange in red...
  8. 8. Closely Related but DifferentClosely Related but DifferentDivergent Evolutionhttp://www.ensatina.net/FILES/ensatina.htmNote how the mapof the speciesdistribution (a) andgenetic divergence(b) directly relatesto the map of thedifferentecosystems inCalifornia (c).This is EVIDENCEof biogeography!
  9. 9. Distantly Related but SimilarDistantly Related but SimilarConvergent Evolution
  10. 10. Distantly Related but SimilarDistantly Related but SimilarWhat Darwin called “Species vary globally.”
  11. 11. Distantly Related but SimilarDistantly Related but SimilarPangolinAsiaGiant AnteaterSouth America
  12. 12. Distantly Related but SimilarDistantly Related but Similar
  13. 13. How old is old?How old is old?
  14. 14. Radioactive DatingRadioactive DatingEarth is 4.5 billionEarth is 4.5 billion oror4,500,000,000 years old.4,500,000,000 years old.
  15. 15. That’s plenty of time for...That’s plenty of time for...
  16. 16. FossilFossilEvidenceEvidenceEvidenceEvidence
  17. 17. Really now...Really now...

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