Question

Other than locomotion, tube feet are

• A. Respiratory
• B. Excretory function
• C. Protective function
• D. All of the above

Answer 1

The correct option is A Respiratory

Echinoderms are the organisms which have central disc like body. They have five arms which are modified tentacles. The tube feet have suction pads. This pads helps to create hydraulic pressure. This pressure allows the organism to move under water. These organisms do not have true heart. There is no respiratory pigment in the blood. The exchange of gases occurs by different organs in different organisms. The dermal branchiae and the tube feet perform the functions of respiratory organs in case of Asterias. Therefore, the tube feet are involved in locomotion and respiration.

Thus, the correct answer is option A.