What is incorrect about Paramecium

Options

A. Macronucleus can be more than one
B. Micronucleus can be more than one
C. Macronucleus is vegetative
D. Micronucleus is reproductive.

Answer

To determine what is incorrect about Paramecium, we need to analyze the provided options based on the characteristics of Paramecium.

### Step-by-Step Solution:

1. **Understand the Structure of Paramecium**:
- Paramecium is a unicellular organism classified under the group of ciliates, which are a type of protozoan. It has two types of nuclei: the macronucleus and the micronucleus.

2. **Identify the Functions of Each Nucleus**:
- The macronucleus is large, kidney-shaped, and is responsible for the metabolic activities of the cell. It is polyploid and undergoes direct division without mitosis.
- The micronucleus is smaller and serves as the genetic reserve, playing a crucial role in reproduction. The number of micronuclei can vary among different species of Paramecium.

3. **Evaluate the Options**:
- **Option 1**: "Macronucleus can be more than one."
- This is incorrect because Paramecium species have only one macronucleus.
- **Option 2**: "Micronucleus can be more than one."
- This is correct as some species of Paramecium can have multiple micronuclei.
- **Option 3**: "Macronucleus is vegetative."
- This is correct since the macronucleus is involved in the vegetative or metabolic functions.
- **Option 4**: "Micronucleus is reproductive."
- This is also correct as the micronucleus is involved in reproductive processes.

4. **Conclusion**:
- The only incorrect statement regarding Paramecium is that the macronucleus can be more than one. Therefore, the answer is **Option 1**.