1. Evidence for evolution Testing evolutionary hypotheses
Life evolves!
What is life?
What is evolution?
Evidence for evolution
Testing evolutionary hypotheses 1

2. What is Life?
Discuss with your neighbors and write a consensus definition of LIFE.
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Map your seat 2

3. Early Evidence for Biological Evolution
Homology
Fossil record
Geological evidence

4. Homology
homologous structure of mammal limbs suggest descent from a common ancestor (Buffon, )
See also Fig 4

5. Homology vs analogy
University of California Museum of Paleontology (

6. Testing predictions from evolutionary theory: are tetrapod limbs homologous?
University of California Museum of Paleontology (

7. Fossil ancestral tetrapods have same limb structure
University of California Museum of Paleontology (

8. Meet Ichthyostega 363 Mya

9. And lobe-finned fish have similar bone structure
390 mya
University of California Museum of Paleontology (

10. Oh no! The fossil record has a gap!
Tiktaalik.uchicago.edu

11. Where can we find exposed rocks of the right age and type?
Tiktaalik.uchicago.edu

12. Tiktaalik, a transitional fossil predicted by evolutionary theory
Tiktaalik.uchicago.edu