EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pure Oxygen was not present in the atmosphere of primitive Earth.
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Pure Oxygen was not available when setting up the experiment.
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Miller and Urey decided to leave Pure Oxygen out of the experiment because there were not living things in the experiment that needed the oxygen.
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Miller and Urey just forgot to use Pure Oxygen.
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Detailed explanation-1: -Miller Urey excluded Oxygen from the mixture of gases in their experiment as they knew that that Oxygen would make the formation of organic molecules from non organic molecules impossible. There is solid empirical evidence that the Earth’s atmosphere has always had significant levels of Oxygen.
Detailed explanation-2: -The primary significance of the Miller-Urey experiment was that the experiment significantly proved that origin of life on the planet Earth had occurred because of the chemical conditions or through Abiogenesis. During the investigation, the reactants that were used were water, methane, ammonia, and hydrogen.
Detailed explanation-3: -The Miller-Urey experiment showed that the building blocks of life could form in the primordial soup. But it overlooked one key variable. The famous experiment showed that a mixture of gases and water could produce amino acids and other biomolecular precursors.
Detailed explanation-4: -But the Miller-Urey results were later questioned: It turns out that the gases he used (a reactive mixture of methane and ammonia) did not exist in large amounts on early Earth. Scientists now believe the primeval atmosphere contained an inert mix of carbon dioxide and nitrogen-a change that made a world of difference.