Answer:
Experimental evidence provided by Miller and Urey proves the origin of life from inanimate matter. They designed an apparatus with glass tubes and flask. In the apparatus, they circulated a mixture of methane, ammonia, hydrogen in the ratio of 2 : 2 : 1 and water vapour. These gases were believed to be present in the ancient atmosphere. Energy was provided by electric spark in the gas flask. The mixture was maintained at a temperature just below 100°C. The experiment was kept working continuously for 18 days and then the condensed material was chemically analyzed. A large number of organic substances including amino acids (glycine, alanine and aspartic acid), urea, lactic acid, simple sugar, purine, pyrimidine, etc. were found in the condensed mixture which proved the abiotic synthesis of organic molecules during the process of origin of life.
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