Spark discharge apparatus for testing chemical origin of life was designed by

Options

A. Urey and Miller
B. Jacob and Monod
C. Oparin and Haldane
D. Dixon and Joly

Answer

To solve the question about who designed the spark discharge apparatus for testing the chemical origin of life, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is about the spark discharge apparatus that was used to simulate early Earth conditions to test theories regarding the chemical origin of life.

2. **Identify Key Contributors**: The key figures associated with the chemical origin of life theories are Oparin and Haldane, who proposed that life originated from simple organic compounds formed in a reducing atmosphere.

3. **Recognize the Experiment**: The spark discharge experiment was specifically designed to recreate the conditions of early Earth, including high temperatures and a mixture of gases believed to be present in the primitive atmosphere.

4. **Name the Scientists**: The spark discharge apparatus was designed by Stanley Miller and Harold Urey. They conducted experiments that demonstrated how organic compounds could be synthesized from inorganic precursors under conditions thought to resemble those of early Earth.

5. **Conclude with the Correct Answer**: Based on the information gathered, the correct answer to the question is that the spark discharge apparatus was designed by Stanley Miller and Harold Urey.

### Final Answer:
The spark discharge apparatus for testing the chemical origin of life was designed by **Stanley Miller and Harold Urey**.

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