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ShabelEvol2 - Bio 1B Summer 2009 Professor Alan Shabel...

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Bio 1B, Summer 2009 Evolution, Lecture 2 Professor Alan Shabel Page 1 of 1 Updated on 23 June 2009 E VOLUTION , L ECTURE 2: D ARWIN & THE G ENETIC B ASIS OF E VOLUTION (458–467, 262–271) Charles Darwin (1809–1882) “stood on the shoulders of giants.” Hutton had envisioned a slow accumulation of gradual changes that shaped planet Earth over millions of years (Gradualism). Lyell had argued forcefully that the natural phenomena acting today also acted in the past, and he dispensed with notions of supernatural influences on the natural historical process (Uniformitarianism). Linnaeus had established a system of scientific nomenclature that was adopted broadly and that facilitated scientific communication and specimen organization. Cuvier and Owen revealed lost worlds of ancient creatures through their fossil reconstructions, and they established the reality of lineage extinction. Darwin embarked on his 5-year voyage on the HMS Beagle with an excellent education, cutting edge scientific instrumentation, a collector’s passion and curiosity, and an open mind. His
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