AP BIOLOGY

Detailed explanation-1: -Miller, along with his colleague Harold Urey, used a sparking device to mimic a lightning storm on early Earth. Their experiment produced a brown broth rich in amino acids, the building blocks of proteins.

Detailed explanation-2: -The Miller-Urey Experiment In 1953, American scientists Stanley Miller and Harold Urey set out to test the theory of the primordial soup. They trapped methane, ammonia, hydrogen and water in a closed system. They then added continuous electrical sparks to simulate lightning strikes.

Detailed explanation-3: -The soup theory was proposed in 1929 when J.B.S Haldane published his influential essay on the origin of life in which he argued that UV radiation provided the energy to convert methane, ammonia and water into the first organic compounds in the oceans of the early earth.

Detailed explanation-4: -One week later Miller and Urey found that simple organic molecules, including amino acids (the building blocks of proteins), had formed under the simulated conditions of early Earth.

Detailed explanation-5: -Stanley Miller and Harold Urey verified the primordial soup theory by simulating the formation of organic molecules on the early Earth. They confined methane, ammonia, water, and hydrogen in a closed system and applied continuous electrical sparks to trigger the formation of the building blocks of life.