Organelles of defence in paramecium are

Options

A. Oocysts
B. Sporocysts
C. Nematocysts
D. Trichocysts

Answer

**Step-by-Step Solution:**

1. **Understanding Paramecium**: Paramecium is a single-celled organism found in aquatic environments. It is known for its heterotrophic mode of nutrition, meaning it consumes other organisms or organic matter for food.

2. **Identifying Defense Organelles**: The question asks about the organelles involved in defense within Paramecium. Various organelles are mentioned in the context of other organisms, but we need to focus on those specific to Paramecium.

3. **Eliminating Incorrect Options**:
- **Oocytes**: These are related to reproductive processes and are not defense organelles in Paramecium.
- **Sporocyst**: This is associated with certain parasitic organisms, not Paramecium.
- **Nematocyst**: This is a specialized structure found in cnidarians (like jellyfish) for defense, not in Paramecium.

4. **Identifying the Correct Defense Organelle**: The correct organelle for defense in Paramecium is the **trichocyst**. Trichocysts are needle-like structures located throughout the body of Paramecium. They can discharge to provide a defensive mechanism against predators and can also aid in capturing prey.

5. **Conclusion**: The organelles of defense in Paramecium are trichocysts, which play a crucial role in its self-defense and feeding strategies.

**Final Answer**: The organelles of defense in Paramecium are **trichocysts**.

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