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Post Darwinian Developments III. Paleontology A. Intermediate Fossils

Explore the fascinating world of paleontology and the discovery of intermediate fossils that provide evidence for the Theory of Evolution by Common Ancestry.

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Post Darwinian Developments III. Paleontology A. Intermediate Fossils

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  1. Post Darwinian Developments III. Paleontology A. Intermediate Fossils

  2. FISH AMPHIBIANS Ichthyostega - Fins and gill covers (FISH) - Feet (AMPHIBIANS) - After fish, before amphibians (just where evolution predicts it should be) XXX

  3. D. Devonian (417-354 mya) - Placoderms - Sharks - Lobe-finned Fishes 365 mya 385 mya

  4. Eusthenopteron

  5. Panderichthys rhombolepis

  6. Tiktaalik roseae

  7. Acanthostega gunnari

  8. Ichthyostega sp.

  9. Archeopteryx • - Fingers, teeth, tail (Reptiles) • Feathers (birds) • - After reptiles, before birds (just where evolution predicts it should be) REPTILES BIRDS XXX

  10. Therapsids REPTILES MAMMALS • - Mammalian skeleton • Intermediate ear • - scales • - After reptiles, before mammals (just where evolution predicts it should be) XXX

  11. Mammals from the Jurassic (185 mya) Therapsids from the Permian (280 mya) to the Triassic (200mya) Pelycosaur Reptiles of the Carboniferous (300 mya)

  12. Australopithecines Australopithecus afarensis

  13. Teeth

  14. Legs

  15. Skulls

  16. Australopithecines • bipedal (human trait) • chimp-sized cranial volume APES HUMANS - After apes, before humans (just where evolution predicts it should be) XXX

  17. Post Darwinian Developments III. Paleontology A. Intermediate Fossils B. A test of four hypotheses using fossils

  18. Question 1: There are many kinds of life forms (species) on Earth. Where do species come from? 1. Four Alternate Hypotheses A. B. C. D. A B C D A B C D A B C D A B C D E A B C D E F F A B C D E F E F G H G

  19. Question 1: There are many kinds of life forms (species) on Earth. Where do species come from? A. 2. Testing Hypotheses in an experiment: - if ‘A’ is true, then we should see the same species in all layers of the fossil record. A B C D A B C D

  20. Question 1: There are many kinds of life forms (species) on Earth. Where do species come from? B. 2. Testing Hypotheses in an experiment: - if ‘B’ is true, then we should see different species in the layers of the fossil record, but no intermediates. A B C D A B C D E F E F

  21. Question 1: There are many kinds of life forms (species) on Earth. Where do species come from? C. 2. Testing Hypotheses in an experiment: - if ‘C’ is true, then we should see different species in the layers of the fossil record, intermediates (E  A) but no shared intermediates (linking A and B). A B C D E F G H

  22. Question 1: There are many kinds of life forms (species) on Earth. Where do species come from? D. 2. Testing Hypotheses in an experiment: - if ‘D’ is true, then we should see different species in the layers of the fossil record, and shared intermediates (linking A and B). A B C D E F G

  23. - RESULTS: Data from the physical world: * Fossils differ from species alive today (refutes ‘A’)

  24. - RESULTS: Data from the physical world: * There are sequences of intermediate fossils (refutes ‘B’)

  25. - RESULTS: Data from the physical world: * There are “linking species” – (refutes ‘C’) FISH AMPHIBIANS Ichthyostega - Fins and gill covers (FISH) - Feet (AMPHIBIANS) - After fish, before amphibians (just where evolution predicts it should be) XXX

  26. Conclusion: Hypotheses A, B, and C are refuted by physical evidence, and hypothesis D is supported. This is the Theory of Evolution by Common Ancestry A. B. C. D. A B C D A B C D A B C D A B C D E A B C D E F F A B C D E F E F G H G

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