A) Protozoa
B) Porifera
C) Annelida
D) Echinodermata
Correct Answer: D
Solution :
Ambulacral system or water vascular system is a characteristic feature of echinoderms. This system comprises the system of canals and tube feet. Tube feet are also a characteristic feature of echinoderms, which help in adhesion, respiration, food capturing and locomotion.You need to login to perform this action.
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