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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?
DarwinBritish, 1809-1882
Studied medicine at Univ. of Edinburgh
Studied theology at Cambridge
1831, HMS Beagle
Darwin's Journey
Patterns of biodiversity1. Species vary globally Flightless birds 2. Species vary locally Finches/tortoises3. Species vary over time FossilsPatterns
Chapter 16 sec 2Ideas That Shaped Darwin's
Thinking
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?
Influences: Hutton and Lyell
Law of Uniformitarianism
Outcome: Earth Changes, do living things?
Influences: Lamarck
Before—Species 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
Influences: Malthus
1798
Uncontrolled population growth
Outcome: Few individuals survive......how?
Influences: Artificial Selection
Breeders
More pronounced traits
Banana—seeds
Outcome: Some variations are better
Chapter 16 Sec 3Darwin Presents His Case
Key Questions
Under what conditions does natural selection occur?
What does Darwin's mechanism for evolution suggest about living and extinct species?
Darwin
Alfred Russell Wallace
On the Origin of Species by Means of Natural Selection
Conditions for Natural Selection:
Struggle for existence
Variation and Adaptation
Survival of the Fittest
It's all about....
....reproduction!
p. 462
Natural Selection: Peppered Moth
Natural Selection: Peppered Moths
Favorable traits passed on
The black peppered -- dark forest
The white peppered moths -- light forest
Adaptation
Adapt natural selection
Common Descent
Well adapted = survive, reproduce
Descent with Modification
Evidence: fossil record
Evolutionary trees
