checkpoint origins of life

checkpoint origins of life - I researched a theory that...

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The summarized theory under “Piecing It Together” describes the atmosphere of early Earth as significantly different to that of today. The theory says that the atmosphere of Earth had high carbon dioxide content and almost no free oxygen. Evidence to support this theory comes from rocks of this era, which show iron carbonate content in the place of iron oxide, indicating that the atmosphere of Earth was rich in carbon dioxide and had no molecular oxygen. Scientific experiments have confirmed that Earth's early atmosphere is suitable for the spontaneous formation of carbon-based compounds such as amino acids which are the building blocks of life. Stanley Miller's periodic soup experiment demonstrated that amino acids, the creators of proteins, came up spontaneously along with small organic molecules when a combination of ammonia, hydrogen, methane, and water was sparked in the lab.
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Unformatted text preview: I researched a theory that suggests that submarine hydrothermal vents are the origins of life. Researchers are suggesting that the heat from the hydrothermal vents of superheated subterranean water helped in the synthesis of polymers, which the sea water quenched and stopped the very energy from wrecking products soon after their formation in the vents. Having said that, hydrothermal vent simulations have just produced 0.001% microscopic yield of hexaglycine, which is of extremely simple complexity in comparison to the simplest of living cells. Added to this, it is also likely that the high temperatures of these geological times would have been enough to degrade any complex molecule that may have been created in some way. References: http://news-service.stanford.edu/news/2004/june2/lowegeo-62.html http://www.talkorigins.org/faqs/abioprob/originoflife.html...
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This note was uploaded on 04/23/2011 for the course BIO 101 taught by Professor Ever during the Spring '11 term at University of Phoenix.

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checkpoint origins of life - I researched a theory that...

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