AP BIOLOGY

Detailed explanation-1: -In 1953, Stanley Miller and Harold Urey did an experiment to test Oparin and Haldane’s ideas. They found that organic molecules could be spontaneously produced under reducing conditions thought to resemble those of early Earth.

Detailed explanation-2: -In 1953, two scientists set out to test Oparin and Haldane’s hypothesis. Harold Urey and his student Stanley Miller tried to calculate the chemical constituents of the atmosphere of the early Earth. They based their calculations on the view that the early atmosphere was reducing.

Detailed explanation-3: -Stanley Miller and Harold Urey tested the first step of the Oparin-Haldane hypothesis by investigating the formation of organic molecules from inorganic compounds. Their 1950s experiment produced a number of organic molecules, including amino acids, that are made and used by living cells to grow and replicate.

Detailed explanation-4: -Stanley Miller, under the guidance of Professor Harold Urey, set up the Miller-Urey Experiment to test this hypothesis. He included basic chemicals that were present on Earth before life began: water, methane, ammonia, and hydrogen.