Microphagial nutrition occurs in :

Options

A. Amphioxus
B. Insects
C. Paramecium
D. Hydra

Answer

**Step-by-Step Solution:**

1. **Understanding Microphagial Nutrition**: Microphagial nutrition is a type of nutrition where organisms ingest small food particles. It is characterized by the use of cilia to create water currents that help in the intake of food.

2. **Role of Cilia**: Cilia are tiny hair-like structures that cover the surface of certain organisms. They play a crucial role in generating water currents, which facilitate the movement of food particles towards the organism's mouth or cytopharynx.

3. **Process of Ingestion**: In microphagial nutrition, the food particles suspended in water are drawn into the organism through the action of cilia. The cilia beat in a coordinated manner to create a flow of water that brings food particles into the organism.

4. **Identifying Organisms with Microphagial Nutrition**: Among the organisms mentioned, Paramecium is known to possess cilia all over its body, which allows it to perform microphagial nutrition effectively. Other organisms like Amphioxus, Insects, and Hydra do not have cilia for this purpose.

5. **Conclusion**: Based on the characteristics of microphagial nutrition and the presence of cilia, it can be concluded that the organism that exhibits microphagial nutrition is Paramecium.

**Final Answer**: Microphagial nutrition occurs in Paramecium.

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