Q. Characteristic feature of phylum-Echinodermata is
A) Radial symmetry
B) Water vascular system
C) Mantle cavity
D) All of these
Explanation
Presence of water vascular system is the most distinctive characteristic of echinoderms
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.