Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
15-3 NOTES: EVOLUTION IN ACTION PP. 308-311 EVOLUTION DEFINED… Evolution of a population is due to environment and the interaction of other species TYPES OF EVOLUTION Convergent evolution: •Organisms with very different ancestors become more alike due to a common environment 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 Ex: shark and dolphin, bird and insect wing TYPES OF EVOLUTION Divergent evolution: -Populations become more and more dissimilar to adapt to the environment -They share a recent common ancestor 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 Adaptive Radiation: Population undergoes divergent evolution until it fills all areas of the environment 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. COEVOLUTION • When two species each evolve in response to each other over a long period of time. • This leads to a close relationship • 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 CLASSWORK “Types of Evolution Tree Map” Vocabulary 4-squares • • • • Convergent evolution Divergent evolution Artificial selection Coevolution Types of Evolution Convergent Evolution Divergent Evolution Definition Definition Example Example 4-SQUARE MODEL Definition Example Picture Word Related Words (3)