Since the 1950's theories about what was in the early atmosphere have changed, scientist have been able to produce amino acids using other mixtures of gases. What does one theory suggest?
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Card 7
Front
Why are we not sure about how life began?
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Card 8
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Amino acids are made from the elements carbon, hydrogen, oxygen and nitrogen. Suggest why Miller and Urey used a mixture of water, ammonia, methane and hydrogen in their experiment.
