15-3 Notes: EVOLUTION IN ACTION

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15-3 Notes EVOLUTION IN ACTION

• pp. 308-311

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Evolution defined

• Evolution of a population is due to environment
  and the interaction of other species

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Artificial Selection

• humans breed for specific traits causing
  differences in species (i.e. dog breeding)

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Types of Evolution

• Convergent evolution Organisms with very
  different ancestors become more alike due to a
  common environment
• (i.e fish and whales)- compare analogous
  structures

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• Ex whale and fish, bird and insect

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Types of Evolution

• Divergent evolution populations become more and
  more dissimilar to adapt to the environment
• -compare homologous structures

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• Adaptive Radiation Population undergoes
  divergent evolution until it fills all areas of
  the environment

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• 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
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coevolution

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

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Classwork

• Types of Evolution Tree Map
• Vocabulary 4-squares
• Convergent evolution
• Divergent evolution
• Artificial selection
• Coevolution

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4-square Model
Definition Picture
Example Related Words (3)
Word