In which of the following, trichocyst is present?

Options

A. Hydra
B. Amoeba
C. Plasmodium
D. Paramecium

Answer

To determine which organism among the given options has trichocysts, we can follow these steps:

1. **Understand what trichocysts are**: Trichocysts are specialized organelles found in certain protozoans, particularly in some ciliates. They are elongated structures that can discharge and are involved in defense or capturing prey.

2. **Analyze the options**:
- **Hydra**: This is a freshwater cnidarian, which does not have trichocysts.
- **Amoeba**: This is a type of protozoan that moves and feeds using pseudopodia. It does not possess trichocysts.
- **Plasmodium**: This is a genus of parasitic protozoans that causes malaria. It does not have trichocysts.
- **Paramecium**: This is a ciliated protozoan known for its hair-like structures called cilia. Paramecium is known to contain trichocysts.

3. **Conclusion**: Among the options provided, **Paramecium** is the organism that has trichocysts.

**Final Answer**: Trichocysts are present in **Paramecium**.

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