The WATER VASCULAR SYSTEM (for locomotion, food capture and transport, respiration) is the most distinctive feature of:
AEchinodermata — adults radial symmetry, larvae bilateral; examples — Asterias, Echinus, Antedon, Cucumaria, Ophiura
BArthropoda
CMollusca
DHemichordata
Answer & Solution
Correct answer: A. Echinodermata — adults radial symmetry, larvae bilateral; examples — Asterias, Echinus, Antedon, Cucumaria, Ophiura
Echinodermata is defined by the water vascular system, which powers tube feet for locomotion, capture/transport of food and respiration. Excretory system is ABSENT. Larvae are bilaterally symmetrical; adults become radially symmetrical.
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