Paramecium/Ciliate differs from other protists in having

Options

A. Contractile vacuoles
B. Trichocysts
C. Food vacuoles
D. Two type of nuclei.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks how Paramecium (a type of ciliate) differs from other protists. We need to identify a unique feature of Paramecium.

2. **Analyzing the Options**: The options provided include:
- Contractile vacuoles
- Trichocyst
- Food vacuoles
- Two types of nuclei

3. **Evaluating Each Option**:
- **Contractile Vacuoles**: These structures are present in many protists, including Paramecium. They help in osmoregulation, but they are not unique to Paramecium.
- **Trichocyst**: This is a defensive structure found in many ciliates, including Paramecium. Therefore, it is not a distinguishing feature.
- **Food Vacuoles**: These are also common in many protists and serve to store food. Hence, they do not differentiate Paramecium from other protists.
- **Two Types of Nuclei**: Paramecium is unique in that it possesses two types of nuclei: a macronucleus and a micronucleus. This feature is not found in most other protists.

4. **Conclusion**: The unique feature that distinguishes Paramecium from other protists is the presence of two types of nuclei.

5. **Final Answer**: Paramecium/Ciliate differs from other protists in having two types of nuclei.

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