Acquiring Evidence that Demonstrates Adaptation

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Acquiring Evidence that Demonstrates Adaptation
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Lamarck (1805)
Neck
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Pratt and Anderson. 1985. Journal of Natural
History
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• Why do giraffes have long necks?
• Population varies in neck mass.
• Males with longer necks are more successful in
  contest competition for females and have greater
  mating success.
  
• Alleles responsible for larger necks are selected
  for and persist in the population
  

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Verifying an adaptation by experiment
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Do Tephritid flies mimic jumping spiders?
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