Ch 3 Evolution

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Ch 3 Evolution
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Fig. 3.3

• Charles Darwin 1859
• Evolution of organisms
• Natural selection

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• Darwins arguments
• Branching organization of life
• Homology
• Vestigial structures and other imperfections
• Embryonic history
• Biogeography

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• Branching structure of life
• horse

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• Homologous
• Green humerus of upper arm
• Red radius of lower arm
• Blue ulna of lower arm
• Tan wrist bones and phalanges
• Analogous

Movie http//www.pbs.org/wgbh/evolution/library/
03/4/l_034_04.html
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Embryonic History
Movie http//www.pbs.org/wgbh/evolution/library/
04/2/l_042_02.html
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• Biogeography
• Similar animals from different families in
  Australia and Europe
• Australian versions all evolved from marsupials

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Mendel Discrete inheritance Blending
inheritance Allele DNA Genotype Phenotype Mutation
Recombination Movie http//www.pbs.org/wgbh/e
volution/library/04/4/l_044_02.html
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Founder effect Allopatric speciation Sympatric
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• Phyletic gradualism
• Traditional view of evolution of horse

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Divergence Punctuated equilibrium
Current version of evolution of horse
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Convergence Iterative evolution
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Macroevolution a step process
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• Macroevolution
• Preadaptation

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• Macroevolution
• Changes in embryonic developmental timing

Tunicate larvae
Tunicate an invertebrate filter feeder