1. The Origin of Species

2. Species Biological Species

3. Ring Species

4. Barriers Prezygotic Habitat Isolation Behavior Isolation Temporal Isolation Mechanical Isolation Gametic Isolation Postzygotic Hybrid Sterility Hybrid Inviability Hybrid Breakdown

5. Habitat Isolation

6. Behavior Isolation

8. Temporal Isolation

9. Mechanical Isolation

10. Gametic Isolation

11. Hybrid Sterility

12. Hybrid Inviability

13. Hybrid Breakdown

14. Modes of Speciation

15. Allopatric Speciation

16. Adaptive Radiation

17. Sympatric Speciation Autopolyploidy

18. Sympatric Speciation Allopolyploidy

19. Macroevolution

20. Gradualism Also called “Neodarwinism” Small changes over time Supporter: Ernst Mayr

21. Punctuated Equilibrium Supporters: Niles Eldredge & Stephen J. Gould Speciation occurs in episodic events – large periods of time with little change and short periods of time with large changes

22. Evolutionary Trends Evolutionary trends are not goal oriented

23. Adaptive Radiation The emergence of numerous species from a common ancestor introduced into an environment, presenting a diversity of new opportunities and problems