1. Divergent vs. Convergent Evolution
Patterns of Evolution
Divergent vs. Convergent Evolution

2. Divergent Evolution
When related species evolve away from their common ancestors to become more successful in their niches.
Homologous structures (vertebrate forearms)
Finches
Red Fox - Woods
Kit Fox - Desert

3. Convergent Evolution
Species that are not closely related independently evolve similar traits.
Analogous structures (fly wing vs. bird wing)

4. Convergent Evolution
The fusiform body shape has evolved several times in very different organisms.

5. *Divergent evolution is to homologous structures as convergent evolution is to analogous structures

6. Question:
Are the shells of turtles and snails examples of convergent or divergent evolution? Explain your answer.

8. Brain size
Jaw size
Tool use
Language development

9. Lucy