Who invented the enhancement effect on photosynthesis?

Options

A. Ruben
B. Calvin
C. Emerson
D. Amon

Answer

**Step-by-Step Solution:**

1. **Identify the Concept**: The question asks about the inventor of the enhancement effect in photosynthesis. The enhancement effect refers to the increased rate of photosynthesis when chloroplasts are exposed to light of specific wavelengths.

2. **Review the Options**: The options provided are:
- A. Robin
- B. Kelvin
- C. Emerson
- D. Arnon

3. **Analyze Each Option**:
- **Robin**: While Robin contributed to the understanding of photosynthesis, he did not specifically discover the enhancement effect.
- **Kelvin**: Known for the Kelvin cycle (dark reactions), he did not discover the enhancement effect.
- **Emerson**: He is credited with discovering the enhancement effect in photosynthesis. He found that chloroplasts exposed to light of wavelengths around 680 nm or higher showed an increased rate of photosynthesis.
- **Arnon**: He contributed to the understanding of the conversion of light energy to chemical energy but did not discover the enhancement effect.

4. **Conclusion**: Based on the analysis, the correct answer is **C. Emerson**.

**Final Answer**: C. Emerson

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