chapter 16 section 1 darwin's voyage of discovery

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