The oxygen liberated during the photosynthesis given by Engelmann using all , except

Options

A. Filamentous green alga Cladophora
B. Unicellular green alga Chlorella
C. Supension of aerobic bacteria
D. Prism to split the light in the its components

Answer

**Step-by-Step Solution:**

1. **Understanding Engelmann's Experiment**: T.W. Engelmann conducted experiments to determine the action spectrum of photosynthesis. He aimed to identify which wavelengths of light were most effective for photosynthesis.

2. **Components Used in Engelmann's Experiment**: Engelmann used several components in his experiments:
- **Filamentous green algae (Cladophora)**: This was used as the organism undergoing photosynthesis.
- **Suspension of aerobic bacteria**: These bacteria were used to indicate the presence of oxygen, as they would gather in areas where oxygen was being produced.
- **Light split into components**: Engelmann used a prism to separate light into its different wavelengths.

3. **Identifying the Odd One Out**: The question asks for the component that Engelmann did not use in his experiments. The options provided include:
- Filamentous green algae (Cladophora)
- Suspension of aerobic bacteria
- Light split into components
- Unicellular green algae
- Chlorolymph

4. **Analyzing the Options**:
- Engelmann did use filamentous green algae and aerobic bacteria.
- He also used light split into components.
- However, he did not use **unicellular green algae** or **chlorolymph** in his experiments.

5. **Conclusion**: The oxygen liberated during photosynthesis as described by Engelmann was not attributed to unicellular green algae or chlorolymph. Thus, the correct answer is **unicellular green algae**.

**Final Answer**: The oxygen liberated during photosynthesis given by Engelmann using all, except **unicellular green algae**.

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