1. What evolution is…

3. Lamarck Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck
Published in 1809
“Evolution as Striving”

4. Lamarck: Inheritance of acquired characters

5. Lamarck: Populations change as individuals change in response to environment

6. Lamarck:
1) no relationships among living taxa 2) species diversity explained by repeated spontaneous generation

7. Slow death of the idea of Spontaneous Generation—1668-1859

9. Natural Selection Lamarck:
As individuals change in response to the environment, populations change over time
Darwin:
Differential reproductive success explains how populations change over time
Natural Selection

10. Lamarckian evolution had some problems…
What did he get right?

11. Charles Darwin 2 great contributions
1) evolution by means of natural selection (mechanism)
2) species are related (common ancestry)
Born 1809 (year Lamarck published)
Published “O of S” when 50 years old! (1859)

12. Darwin: Populations change as individuals experience different reproductive success (based on environment)
Lamarck vs. Darwin:
Differential reproductive success is the main difference

13. Evolution by Means of Natural Selection