Paramecium contains

Options

A. Two micronuclei only
B. two macronuclei only
C. One macro-and one, two or more micronuclei
D. One micro-and one,two or more macronuclei

Answer

To answer the question "Paramecium contains," we need to analyze the structure of Paramecium and the types of nuclei it possesses.

### Step-by-Step Solution:

1. **Understanding Paramecium**: Paramecium is a unicellular organism classified under the kingdom Protista. It is commonly found in freshwater environments.

2. **Types of Nuclei in Paramecium**: Paramecium contains two types of nuclei:
- **Macronucleus**: This is typically one in number, has a kidney shape, and is packed with chromatin and genetic material. It is also referred to as the vegetative nucleus.
- **Micronucleus**: This can vary in number; Paramecium can have one, two, or three micronuclei. The micronucleus does not have a nucleolus and is referred to as the generative nucleus.

3. **Evaluating the Options**:
- **Option 1**: 2 micronuclei only - Incorrect, as Paramecium has at least one macronucleus.
- **Option 2**: 2 macronuclei only - Incorrect, as Paramecium has only one macronucleus.
- **Option 3**: 1 macronucleus and 1, 2, or 3 micronuclei - Correct, as this accurately describes the nuclear composition of Paramecium.
- **Option 4**: 1 micronucleus and 1, 2, or 3 macronuclei - Incorrect, as there is only one macronucleus.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 3**: Paramecium contains 1 macronucleus and 1, 2, or 3 micronuclei.