Who founded that water is an essential requirement of photosynthesis?

Options

A. J.Prsiestely
B. Saussure
C. Helmont
D. Ingen Housz

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants synthesize food using sunlight, carbon dioxide, and water. It is essential for plant growth and energy production.

2. **Identifying Key Scientists**: The question asks about the scientist who discovered that water is essential for photosynthesis. Two key figures in this field are Jan Ingenhousz and Joseph Priestley. Jan Ingenhousz is known for demonstrating that oxygen is released during photosynthesis.

3. **Joseph Priestley’s Contribution**: Joseph Priestley conducted experiments that showed that plants could restore air that had been "damaged" by burning candles or breathing animals, indicating that plants produce oxygen.

4. **Identifying the Correct Scientist**: The scientist who specifically concluded that water is an essential requirement for photosynthesis is **Sassafras** (often referred to as "Sassaw" in the transcript). He extended the studies of Jan Ingenhousz and conducted controlled experiments to determine the role of water.

5. **Sassaw's Experiment**: Sassaw enclosed a plant in a glass container and measured the weight of the carbon dioxide and the plant. He observed that as carbon dioxide was absorbed, the weight of the gas decreased. He also noted that the amount of oxygen released was equal to the carbon dioxide absorbed, with a small residual weight that he concluded was due to the water absorbed by the plant.

6. **Conclusion**: From his experiments, Sassaw concluded that both carbon dioxide and water are essential for the process of photosynthesis, thus establishing that water is a crucial requirement.

7. **Final Answer**: The scientist who founded that water is an essential requirement of photosynthesis is **Sassaw**.

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