Macronucleus of Paramecium takes part in

Options

A. Transmission of hereditary characters
B. Controlling normal cellular metabolism
C. Production of variations and adaptability
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Paramecium Structure**: Paramecium is a unicellular organism that possesses two types of nuclei: the macronucleus and the micronucleus.

2. **Function of Macronucleus**: The macronucleus is primarily responsible for controlling the normal cellular metabolism of the organism. It regulates various metabolic processes essential for the cell's survival and functioning.

3. **Function of Micronucleus**: In contrast, the micronucleus plays a role in sexual reproduction and genetic exchange. It is involved in the transmission of hereditary information during reproduction.

4. **Analyzing the Options**:
- **Transmission of hereditary character**: This is primarily the function of the micronucleus.
- **Controlling normal cellular metabolism**: This is the main function of the macronucleus.
- **Production of variation and adaptability**: This is also more related to the micronucleus and its role in genetic exchange.
- **All of the above**: Since not all options correctly describe the function of the macronucleus, this cannot be the correct answer.

5. **Conclusion**: The correct answer is that the macronucleus of Paramecium takes part in controlling normal cellular metabolism.

**Final Answer**: Controlling normal cellular metabolism.

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