1. Speciation evolution of a new species
occurs when members of similar populations no longer interbreed to produce offspring in a natural environment

2. In order for their to be speciation, there must be isolation

3. Geographic isolation - when a physical barrier divides a population
volcano
earthquake (produce islands)
flood

4. Gene pools will evolve separately
can become different enough to be separate species

5. Speciation

7. Reproductive isolation
Populations can no longer produce fertile offspring
genetic material can be so different that reproduction is not possible

8. Behaviors can also prevent reproduction
mating at different times of the year

10. Patterns of Evolution

11. 1) Convergent evolution
distant related organisms evolve similar traits
develop structures for the same function
analogous structures

12. Convergent evolution

13. 2)Divergent evolution
pattern where species that were similar to an ancestral species become more distinct
become less alike as they adapt to separate environments
homologous

14. Divergent Evolution

15. adaptive radiation - a species adapts into a variety of species to fit many diverse habitats
Finches’ beaks adapted to food sources on Galapagos Islands

16. Adaptive Radiation

17. Adaptive Radiation

18. ADAPTIVE RADIATION –An example of divergent evolution

19. Breeding organisms for desired traits
Artificial Selection
Breeding organisms for desired traits
Agriculture (plants and livestock)
Dogs and other pets

20. Artificial Selection

21. What about Super Cow?