1. 15-3 NOTES: EVOLUTION IN ACTION PP. 308-311

2. EVOLUTION DEFINED… Evolution of a population is due to environment and the interaction of other species

3. TYPES OF EVOLUTION Convergent evolution: Organisms with very different ancestors become more alike due to a common environment

4. TYPES OF EVOLUTION Convergent evolution: Organisms with very different ancestors become more alike due to a common environment compare analogous structures: same functions but different development

5. Ex: shark and dolphin, bird and insect wing

6. TYPES OF EVOLUTION Divergent evolution: -Populations become more and more dissimilar to adapt to the environment -They share a recent common ancestor

7. TYPES OF EVOLUTION Divergent evolution: -Populations become more and more dissimilar to adapt to the environment -They share a recent common ancestor -compare homologous structures: similar body part but may have different functions

8. Adaptive Radiation: Population undergoes divergent evolution until it fills all areas of the environment

9. Mammals went through adaptive radiation during the tertiary period. When the dinosaurs died out, mammals evolved to fit niches once used by dinosaurs Darwin’s Finches are an example of adaptive radiation. They can be found in all areas of the island: the ground, in bushes, in all levels of the trees.

10. COEVOLUTION When two species each evolve in response to each other over a long period of time. This leads to a close relationship

11. EX: Rough-skinned newt and garter snake Newt evolved to produce neurotoxins then the snake evolved resistance to this toxin through genetic mutations. Birds and flowers, Humans and bacteria are other examples Birds and flowers, Humans and bacteria are other examples

12. CLASSWORK “Types of Evolution Tree Map” Vocabulary 4-squares Convergent evolution Divergent evolution Artificial selection Coevolution

13. Types of Evolution Convergent Evolution Definition Example Divergent Evolution Definition Example

14. 4-SQUARE MODEL DefinitionPicture ExampleRelated Words (3) Word