Cell Evolution and Extraterrestrials

Cell Evolution and Extraterrestrials - Cell Evolution and...

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Unformatted text preview: Cell Evolution and Extraterrestrials bubbles- possible precursors to cells each cell's interior differs from the exterior molecules w/ hydrophobic regions spontaneoulsy form bubbles in water edges of early oceans exposed to methane, simple organic molecules, and radiation primary abiogenesis- theory developed by Alexander Oparin o early cells evolved in conditions very different from current conditions o protobionts- early bubblelike structures that separated their contents from the environment o idea became popular after the Urey-Miller experiment Lerman's bubble hypothesis- shows how organic molecules became more complex o underwater volcanoes release gases in bubbles o gases in bubbles react to form simple organic molecules o bubbles pop and release contents into the air once they reach the surface o UV rays and energy sources make the simple organic molecules form more complex molecules o complex molecules fall back into the water and become in enclosed in bubbles other names for bubbles - microspheres, protocells, protobionts, micelles, liposomes, coacervates (depending on what the bubbles contain) coacervates- lipid bubbles that form an outer 2-layer boundary; can grow by adding more lipid molecules from the environment; can divide by pinching in 2 like bacteria...
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Cell Evolution and Extraterrestrials - Cell Evolution and...

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