Paramecium contains a dimorphic nucleus that has

Options

A. two micronuclei
B. one macro & one or two micronuclei
C. two macronuclei
D. one micro and one, two or more macro nuclei

Answer

**Step-by-Step Solution:**

1. **Understanding Paramecium**:
- Paramecium is a unicellular organism belonging to the kingdom Protista. It is a ciliated protozoan that lives in freshwater environments.

2. **Identifying the Nucleus Types**:
- The question mentions that Paramecium contains a dimorphic nucleus. "Dimorphic" means that there are two different forms or types of nuclei present in the organism.

3. **Types of Nuclei in Paramecium**:
- Paramecium has two types of nuclei:
- **Macronucleus**: This is the larger nucleus, typically one in number, and is responsible for non-reproductive functions, including the control of metabolic activities.
- **Micronucleus**: This is smaller in size and can be one or more in number. It is primarily involved in reproductive functions.

4. **Analyzing the Options**:
- Now, let's evaluate the provided options based on the understanding of the nuclei in Paramecium:
- **Option A**: Two micronuclei – This is incorrect because Paramecium has one macronucleus and one or more micronuclei.
- **Option B**: One macronucleus and one or two micronuclei – This is correct as it accurately describes the nuclear structure of Paramecium.
- **Option C**: Two macronuclei – This is incorrect since there is only one macronucleus.
- **Option D**: One micronucleus and one or more macronuclei – This is incorrect because there is only one macronucleus.

5. **Conclusion**:
- The correct answer is **Option B**: One macronucleus and one or two micronuclei.

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