1. The Formation of New Species

2. Isolation of Subpops  Mechanisms of evolution cause isolated subpops to diverge

3. Allopatric Speciation  Geographic isolation prevents interbreeding

4. Adaptive Radiation  A series of allopatric speciation events

5. Sympatric Speciation  Reproductive isolation prevents interbreeding  May be pre- or postzygotic AllopatricSympatric

6. Prezygotic Isolation  Habitat

7. Prezygotic Isolation  Behavioral

8. Mating Season for Group A Mating Season for Group B Prezygotic Isolation  Temporal J F M A M J J A S O N D

9. Prezygotic Isolation  Mechanical

10. Prezygotic Isolation  Gametic

11. Postzygotic Isolation

12. Speciation Review 1. Studying : good grades :: _______:speciation 2. Contrast microevolution and macroevolution. 3. What type of isolation must exist in a case of allopatric speciation? 4. How does a temporal barrier lead to speciation, and what type of speciation would this be?

13. Patterns of Evolution  Divergent Variation in Morphology TIME

14. Patterns of Evolution  Convergent Variation in Morphology TIME

15. Patterns of Evolution

17.  Coevolution Variation in Morphology TIME

18. Patterns of Evolution  Coevolution