1. Evolution: Evidence and Theory
Chapter 15

2. Whale Evolution

3. Process of Natural Selection

5. Comparing Vertebrate Embryo Development

6. Forelimbs of Vertebrates

7. What Do Fossils Tell Us
Organisms existed previous to current time
Some organisms are no longer present
Life has changed as time has gone by
Environment has changed over time

8. Fossilization Incomplete record Soft v.s. hard organisms Habitat
Access

10. Evolution of the Horse

13. Interpreting the fossil record
It is not a perfect science!

14. Evidence of Change Over Time
One type of fossil formation
Becoming a Fossil

15. Evidence of Change Over Time
When was earth estimated to have formed?
Radioactive Dating
Carbon 14 half life
Young
Old
Radioisotope dating

16. Rate of Decay of Potassium-40

17. By knowing Carbon 14’s half life you, can estimate the age of fossils.
Aging fossils

18. Continental Drift Theory

21. Darwin’s Voyage

24. Traits that are favorable for some organisms in some environments are not necessarily favorable for all organisms or all environments