The organs of locomotion in Enchiniodermata are

Options

A. Pseudopodia
B. Parapodia
C. Foot
D. Tube feet

Answer

**Step-by-Step Solution:**

1. **Understanding Echinodermata**: Echinodermata is a phylum of marine animals that includes starfish, sea urchins, and sea cucumbers. They are characterized by their radial symmetry and a unique water vascular system.

2. **Identifying the Locomotion Mechanism**: The primary organs of locomotion in Echinodermata are the tube feet, which are part of the water vascular system. This system is a hydraulic mechanism that allows these organisms to move.

3. **Function of the Water Vascular System**: The water vascular system consists of a network of canals filled with seawater. It helps in locomotion, respiration, and the transportation of food and waste.

4. **Role of Tube Feet**: The tube feet are small, flexible appendages that extend from the body. They operate by hydraulic pressure, allowing the echinoderms to push against surfaces and move.

5. **Evaluating Other Options**:
- **Pseudopodia**: These are temporary extensions of the cytoplasm found in amoebas, not echinoderms.
- **Parapodia**: These are found in annelids (segmented worms) and are not related to echinoderm locomotion.
- **Foot**: This term typically refers to the muscular structure in mollusks, which is also not applicable to echinoderms.

6. **Conclusion**: The correct answer to the question about the organs of locomotion in Echinodermata is the tube feet.

**Final Answer**: The organs of locomotion in Echinodermata are the tube feet.

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