Locomotory structures in protists are-

Options

A. Flagella
B. Cillia
C. Pseudopodia
D. All

Answer

To answer the question about the locomotory structures in protists, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Protists**:
- Protists are a diverse group of eukaryotic microorganisms that belong to the kingdom Protista. They can be unicellular or multicellular and exhibit various forms of locomotion.

2. **Identifying Locomotory Structures**:
- The question specifically asks for locomotory structures, which are the parts of the organism that facilitate movement.

3. **Flagella**:
- Flagella are long, whip-like structures that can be single or multiple. They are used by some protists for swimming through liquid environments. For example, the genus Euglena uses flagella for movement.

4. **Cilia**:
- Cilia are short, hair-like structures that cover the surface of some protists. They are numerous and beat in coordinated waves to propel the organism. An example of a protist that uses cilia is Paramecium.

5. **Pseudopodia**:
- Pseudopodia, meaning "false feet," are temporary projections of the cell's cytoplasm. They are used by some protists for movement and feeding, such as in the case of Amoeba.

6. **Conclusion**:
- Since protists can utilize all three types of locomotory structures (flagella, cilia, and pseudopodia), the correct answer to the question is "all."

### Final Answer:
The locomotory structures in protists are flagella, cilia, and pseudopodia. Therefore, the correct option is "all."

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