Question

Echinoderms have ............ for locomotion.

• A. Flagella
• B. Cilia
• C. Water driven tube system
• D. All of the above

Answer 1

The correct option is C Water driven tube system

• Echinoderms have a peculiar water-driven tube system that they use for moving around, food and waste transportation, and respiration.
• The water vascular system includes a ring canal situated around the mouth, which gives tubular radial extensions, called radial canals.
  
• Each radial canal ends blindly at the end of the arm and gives off along its course lateral vessels, each joining a tube foot as shown in the given figure.
  

So, the correct answer is option C.