Curve showing the effectiveness of differnent wavelength of light in photosynthesis was fist given by Engleman using all , except

Options

A. Filamentous green alga Cladophora
B. Unicelular green alga chlorella
C. Suspension of aerobic bacteria
D. Prism to split the light in its components

Answer

### Step-by-Step Solution:

1. **Understand the Experiment**: The question refers to Engelman's experiment, which aimed to determine the effectiveness of different wavelengths of light in photosynthesis by measuring the amount of oxygen produced.

2. **Identify the Components Used**: Engelman used:
- **Filamentous green algae**: This organism was used to observe photosynthesis.
- **Suspension of aerobic bacteria**: This was used to measure the oxygen produced during photosynthesis.
- **Prism**: A prism was employed to split light into its component wavelengths to see which ones were most effective for photosynthesis.

3. **Analyze the Options**: The options given are:
- Filamentous green algae
- Unicellular green algae
- Suspension of aerobic bacteria
- Prism

4. **Determine the Incorrect Option**:
- Filamentous green algae, suspension of aerobic bacteria, and prism were all used in Engelman's experiment.
- The **unicellular green algae** was not used because Engelman specifically used filamentous green algae for his observations.

5. **Conclusion**: The correct answer to the question is that Engelman did not use **unicellular green algae** in his experiment.

### Final Answer:
Engleman did not use **unicellular green algae** in his experiment.

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