Exam 2

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Exam 2

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Ch 12 How Populations Evolve
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Antibiotic Resistance
6.6
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Human Diversity
Vit D3
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Evolution

• Inherited change in organisms over time
• Charles Darwin
• Origin of Species 1859
• Common ancestor
• Descent with Modification
• Earth was constantly changing, organisms adapt

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Descent with Modification (12.2)
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Evidence for Evolution

• Fossils preserved remnant or impression of an
  organism that lived in the past
• Fossil records found in rock sedimentation
• Strata (layers of rock)

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Fossil (Impression)
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Fossil Formation (12.4)
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oldest
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Evidence for Evolution

• Biogeography geographic distribution of species
• Comparative anatomy comparison of body
  structures
• Homologous structures

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Biogeography (12.7) Diverse Pouched Mammals in
Australia
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Comparative Anatomy
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Evidence for Evolution

• Comparative embryology comparisons of structures
  that appear during development
• Molecular biology comparison of DNA or amino
  acids

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Comparative Embryology (12.9)
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Molecular Biology (DNA Comparison 12.10)
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Mechanism of Evolution

• Natural selection different reproductive
  success among varying individuals in their
  natural environment
• Those better suited will have greater success in
  reproduction

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Selection for Pesticide Resistant Insects (12.14)
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camouflage
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mimicry
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Generalized Effects of Natural Selection (12.25)