Q.
In 1953, S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include
Experimental proof of the theory of chemical evolution was given by Urey and Miller in 1953, who created primitive atmospheric conditions in a laboratory, by using electric discharge in a closed flask containing CH4, H2, NH3 in 2: 1: 2 ratio and water vapour at 800⁰C. This mixture was provided with energy for interaction by 75000 volts sparks using electrodes. The gases were allowed to condense in a narrow tube and pass through a liquid flask.
He performed this experiment continuously, for a week and analyzed the composition of the liquid inside the apparatus. He found a large number of simple organic compounds including some amino acids such as alanine, glycine, and aspartic acid. Miller, thus, proved that organic compounds were the basis of life.