Chapter 22 – Descent with Modification: A Darwinian View of Life.

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Presentation transcript:

Chapter 22 – Descent with Modification: A Darwinian View of Life

Jean-Baptiste de Lamarck Late 1700s Inheritance of Acquired Characteristics

Charles Darwin (1809 – 1882) At age 22, went on 5 year mapping expedition of HMS Beagle

Influences on Darwin Thomas Malthus –“Essay on the Principle of Population” 1798 Charles Lyell –“Principles of Geology” 1830

Influences on Darwin cont Alfred Wallace

“On Origin of Species by Natural Selection” Population has variety Specific environment favors particular traits

Darwin’s finches

Artificial selection

Homologous structures Have different function/shape but derived from same body part of common ancestor

Fossil record

Vestigial structures

Embryonic development

Convergent evolution

Molecular record Closely related species have very similar DNA sequences

Industrial melanism

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