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

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Presentation on theme: "Chapter 22 – Descent with Modification: A Darwinian View of Life."— Presentation transcript:

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

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

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

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

5 Influences on Darwin cont Alfred Wallace

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

7 Darwin’s finches

8 Artificial selection

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

10 Fossil record

11 Vestigial structures

12 Embryonic development

13 Convergent evolution

14 Molecular record Closely related species have very similar DNA sequences

15 Industrial melanism


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