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First Day of Class
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Heterotrophic Theory
idea that early cells developed in an atmosphere with NO FREE OXYGEN
CO2, H2, NH3, H2O (sulfur?)
1953 Miller & Urey
CH4 NH3 H2 H20
continuous source of energy (heat)
electric spark
after 1 week 10-15% carbon is organic and 2% is in amino acid
Criticism
constant energy source doesn't effectively mimic earth
Heterotrophic Theory
idea that early cells developed in an atmosphere with NO FREE OXYGEN
CO2, H2, NH3, H2O (sulfur?)
1953 Miller & Urey
CH4 NH3 H2 H20
continuous source of energy (heat)
electric spark
after 1 week 10-15% carbon is organic and 2% is in amino acid
Criticism
constant energy source doesn't effectively mimic earth
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- Early Evolution and Evidence of Evolution
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- ajillianw
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