What evolution is…

What evolution is…

What evolution is 1 2 Lamarck Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck

Published in 1809 Evolution as Striving http://evolution.berkeley.edu/evosite/history/evol_happens.shtml 3

Lamarck: Inheritance of acquired characters 4 Lamarck: Populations change as individuals change in response to environment

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

Slow death of the idea of Spontaneous Generation1668-1859 7 8

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 9

Lamarckian evolution had some problems What did he get right? 10 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) 11 Darwin: Populations change as individuals experience different reproductive success

(based on environment) Lamarck vs. Darwin: Differential reproductive success is the main difference 12

Evolution by Means of Natural Selection 13

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