Darwin and natural selection

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Darwin and natural selection

  1. 1. Bell Work (pg 4)• What does “Natural Selection” mean?Checking: Create a timeline (green) andRadiometric dating (yellow)
  2. 2. Construct your Interactive Notes• Staple 7 pages to the cover• On the cover, write• Evolution• Name, Period• Draw a color picture
  3. 3. Notes: Darwin and Natural Selection(page 2)• Charles Darwin (1809-1882) Founder ofmodern evolutionary biology
  4. 4. Notes: Darwin and Natural Selection(page 2)• Charles Darwin (1809-1882) Founder ofmodern evolutionary biology• Began formulating ideas about naturalselection during journey around SouthAmerica aboard the Beagle in the 1830’s
  5. 5. Notes: Darwin and Natural Selection(page 2)• Charles Darwin (1809-1882) Founder ofmodern evolutionary biology• Began formulating ideas about naturalselection during journey around SouthAmerica aboard the Beagle in the 1830’s• Published “On the Origin of Species” in 1859
  6. 6. Natural Selection• “The best idea anyone ever had”
  7. 7. Natural Selection• “The best idea anyone ever had”1. Individuals vary
  8. 8. Natural Selection• “The best idea anyone ever had”1. Individuals vary2. Organisms produce more offspring than theenvironment can support, leading to a“struggle for survival”
  9. 9. Natural Selection• “The best idea anyone ever had”1. Individuals vary2. Organisms produce more offspring than theenvironment can support, leading to a“struggle for survival”3. Individuals with traits that help them surviveare more likely to produce offspring
  10. 10. Natural Selection• “The best idea anyone ever had”1. Individuals vary2. Organisms produce more offspring than theenvironment can support, leading to a“struggle for survival”3. Individuals with traits that help them surviveare more likely to produce offspring4. Over time, those favorable traits will becomemore common in the population
  11. 11. Example• A mutation causes a snail to bewhite, allowing it to blend in with the whiterocks it lives on. This snail is less likely to beeaten and will have more offspring. Overtime, white snails will become more commonin the population
  12. 12. Output activity (pg 3)• Come up with your own example of naturalselection. The example can be real or fanciful.

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