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Chapter 16 section 1 Darwin's Voyage of Discovery

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Chapter 16 section 1 Darwin's Voyage of Discovery Key Questions What was Charles Darwin's contribution to science? What three patterns of biodiversity did Darwin note? – PowerPoint PPT presentation

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Title: Chapter 16 section 1 Darwin's Voyage of Discovery


1
Chapter 16 section 1 Darwin's Voyage of Discovery
2
Key Questions
  • What was Charles Darwin's contribution to
    science?
  • What three patterns of biodiversity did Darwin
    note?

3
Darwin
  • British, 1809-1882
  • Studied medicine at Univ. of Edinburgh
  • Studied theology at Cambridge
  • 1831, HMS Beagle

4
Darwin's Journey
  • Patterns of biodiversity
  • 1. Species vary globally
  • Flightless birds
  • 2. Species vary locally
  • Finches/tortoises
  • 3. Species vary over time
  • Fossils
  • Patterns

5
Chapter 16 sec 2Ideas That Shaped Darwin's
Thinking
6
Key Questions
  • What did Hutton and Lyell conclude about Earth's
    history?
  • How did Lamarck proposed that species evolve?
  • What was Malthus's view of population growth?
  • How is inherited variation used in artificial
    selection?

7
Influences Hutton and Lyell
  • Law of Uniformitarianism
  • Outcome Earth Changes, do living things?

8
Influences Lamarck
  • BeforeSpecies unchanging divine creation
  • French Scientist (1744-1829)
  • How organisms changed
    over time
  • Theory of Use and Disuse
  • Birds webbed feet
  • Giraffe
  • WRONG!!!
  • Outcome Organisms change somehow

9
Influences Malthus
  • 1798
  • Uncontrolled population growth
  • Outcome Few individuals survive......how?

10
Influences Artificial Selection
  • Breeders
  • More pronounced traits
  • Bananaseeds
  • Outcome Some variations
    are better

11
Chapter 16 Sec 3Darwin Presents His Case
12
Key Questions
  • Under what conditions does natural selection
    occur?
  • What does Darwin's mechanism for evolution
    suggest about living and extinct species?

13
Darwin
  • Alfred Russell Wallace
  • On the Origin of Species by Means of Natural
    Selection

14
Conditions for Natural Selection
  • Struggle for existence
  • Variation and Adaptation
  • Survival of the Fittest
  • It's all about....
  • ....reproduction!
  • p. 462

15
Natural Selection Peppered Moth
16
Natural Selection Peppered Moths
  • Favorable traits passed on
  • The black peppered -- dark forest
  • The white peppered moths -- light forest
  • Adaptation
  • Adapt ? natural selection

17
Common Descent
  • Well adapted survive, reproduce
  • Descent with Modification
  • Evidence fossil record
  • Evolutionary trees
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