1. Chapter 15: The Theory of Evolution
Biology I

2. Pre-Darwin Each species is unique and unchanging Geology
fossils in strata changed with depth
Sudden changes from catastrophism?
Uniformitarianism
changes continually act on earth

3. Lamarck – Acquired Inheritance, Use vs. Disuse

4. Charles Darwin Studied medicine and theology Natural scientist
Developed theory after observing organisms (Galapagos Islands)

5. Darwin’s Voyage on the Beagle

6. Descent with Modification – common ancestor

8. Theory of Evolution by Natural Selection
Overproduction in a population – supply and demand

9. 2. Diversity – variation within a population
What causes diversity?

10. 3. Struggle to survive - competition
Adaptations give advantages

11. Identify the adaptations

12. 4. Differential Reproduction
Fittest reproduce more, traits of population shift

13. Clarification… Adaptation Acclimatization
A trait that gives advantage in a population
Versus
Acclimatization
Individual
physiological
changes