State the hypothesis proposed by Oparin and Haldane. How was it experimentally proved by S.L. Miller ? Explain.

Explanation

### Step-by-Step Solution

1. **Hypothesis Proposed by Oparin and Haldane**:
- Oparin and Haldane proposed the hypothesis that the first forms of life on Earth originated from pre-existing non-living organic molecules. They suggested that these organic molecules were formed from inorganic molecules under the conditions present on the early Earth. This process is known as abiogenesis.

2. **Conditions on Early Earth**:
- They theorized that the early Earth had a reducing atmosphere, which was rich in gases such as methane (CH₄) and ammonia (NH₃). This atmosphere was conducive to the formation of organic compounds.

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