ch22 - Chapter 22: A Darwinian View of Life Evolution: the...

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Chapter 22: A Darwinian View of Life Evolution: the change in alleles or genes of a population over time (change in gene pool) Evolution : processes that have transformed life on earth from its earliest forms to today’s diversity. Origin of Species by Means of Natural Selection Published by Charles Darwin on November 24, 1859 1st convincing hypothesis for how evolutionary change could occur to produce adaptations Jean Baptiste Lamarck Only previous model on how life evolved that made any sense Good parts: used fossil record related extinct species to extant species proposed changes due to environmental adaptation Lamarck’s Ideas on Evolution Use and disuse : body organs used a lot become bigger and stronger, organs not used deteriorate Inheritance of acquired characteristics : modifications acquired during lifetime passed on to offspring Charles Darwin Born: 1809 in England (year Lamarck published) Quit medical school, went to Cambridge to join clergy (all naturalists were
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ch22 - Chapter 22: A Darwinian View of Life Evolution: the...

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