What was site of origin of life?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Primitive Earth**: The origin of life is believed to have occurred on primitive Earth, which had a very different atmosphere compared to today. The atmosphere was reducing, meaning it lacked free oxygen.

2. **Composition of Primitive Earth**: Approximately 85% to 90% of the Earth's surface was covered by water, with very little land available. This significant presence of water is crucial for the origin of life.

3. **Atmospheric Conditions**: The atmosphere of primitive Earth contained gases such as methane, ammonia, carbon dioxide, hydrogen, and water vapor. Notably, oxygen was absent during this time.

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