Cha 25-2010-st-1

Cha 25-2010-st-1 - Dinosaurs singing in the back yard?...

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Unformatted text preview: Dinosaurs singing in the back yard? "I just taught you the whole Bible and you ask me 'Who is Jesus?'" 4.8 billion years ago- earth 3.5 life [started evolving in water] Minerals pulled to the center by gravitational pull Took time for water to accumulate when earth cooled down Earths atmosphere had no oxygen- REDUCING Organic molecules formed underwater [near vents] Release of oxygen made earth an oxidizing environment How did life begin? PreDawinian Spontaneous generation Life evolved from inanimate objects Louis Pasteur disproved spontaneous generation [instead, life evolved from life] Organic molecules can form spontaneously under prebiotic conditions 1920 Alexander Oparin 1930 John Haldane -speculated that organic molecules could not form when there is oxygen [early earth was w/o oxygen, otherwise bonds would not have formed] Early atmosphere reducing Simulated early earth conditions in a lab Used electrical spark [simulated lightning, not...
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This note was uploaded on 11/06/2011 for the course BIL 160 taught by Professor Krempels during the Spring '08 term at University of Miami.

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Cha 25-2010-st-1 - Dinosaurs singing in the back yard?...

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