Miller and Urey performed experiments to support the hypothesis. In their experiment, they combined , ammonia, hydrogen gas, and water in a closed system and it to mimic conditions on early Earth. After stimulating the system with to mimic , they discovered that were produced. This suggests that early Earth had a atmosphere, leading to redox reactions that catalyzed the synthesis of organic monomers such as .

1. Alexander Oparin's and J. B. S. Haldane's

2. Methane (CH4)

3. Simulate

4. Sparkling device

5. Lightning storm

6. brown broth rich in amino acids

7. Reducing

8. spontaneous organic compound

9. Amino acids.

Explanation:

Miller and Urey performed experiments to support the "Alexander Oparin's and J. B. S. Haldane's" hypothesis. In their experiment, they combined "Methane (CH4)," ammonia, hydrogen gas, and water in a closed system and "Simulate" it to mimic conditions on early Earth. After stimulating the system with a "Sparkling device" to mimic "Lightning Storm, " they discovered that "brown broth rich in amino acids" was produced. This suggests that early Earth had a "Reducing" atmosphere, leading to redox reactions that catalyzed the "spontaneous organic compound" synthesis of organic monomers such as "Amino acids."