AP BIOLOGY

Detailed explanation-1: -Scientists Alexander I. Oparin and John B. S. Haldane independently proposed the primordia soup theory in the 1920s.

Detailed explanation-2: -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-3: -In the 1920s, the famous British biometric scientist John Haldane and Aleksandr Oparin, the Russian biochemist independently set forth similar ideas for the origin of life on Earth.

Detailed explanation-4: -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.