State in what ways Stanley Miller simulates the conditions of

(a) The formation of organic molecules of life to prove the theory of chemical evolution.

(b) The primitive atmosphere on earth.

(a) In an apparatus, Miller added gases containing methane, ammonia, and hydrogen and the gases are then condensed in a narrow tube. Condensed gases are passed to other flask containing liquid and the flask was heated to provide energy. Also, electric sparks and water vapour (800 ℃) were also provided to create the primitive atmosphere of the earth. This results in the formation of amino acids.

(b) Primitive earth has a reducing atmosphere and an ocean. Miller creates this setup by designing glass apparatus having gases, a condenser, a liquid, a heater for energy, an electric spark and water vapour.