Ch.26 early earth origin of life
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Early Earth & the Origin of Life Chapter 26
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Transcript of Ch.26 early earth origin of life
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Early Earth & the Origin of Life
Chapter 26
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Clock analogy for some key events in evolutionary history
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Early Earth
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Louis Pasteur
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Pasteur and biogenesis of microorganisms (Layer 1)
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Pasteur and biogenesis of microorganisms (Layer 2)
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Pasteur and biogenesis of microorganisms (Layer 3)
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The Miller-Urey experiment
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RNA may have been the first genetic material
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• RNA acts as a template to make polypeptides
• Polypeptides act as primitive enzymes to replicate RNA
• Exclusive relationship evolves with membrane
Hypothesis for beginning of molecular cooperation
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Protobionts: Pre-cells
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The History of Life
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5-Kingdom System
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Things are Changing…