Zoology-Phylum Characteristics
NEET Zoology Phylum Characteristics MCQ Question
Type: MCQ-diagram based-Medium-Class 11
A diagram shows an adult echinoderm with its mouth located on the underside and anus on the upper side. Which feature is most distinctive for echinoderms, as seen in the diagram?
A
Water vascular system
B
Bilateral symmetry in adults
C
Closed circulatory system
D
Presence of notochord
Correct Answer
Option A
Detailed Explanation
The most distinctive feature of echinoderms is the presence of a water vascular system, as highlighted in the NCERT context. Adult echinoderms are radially symmetrical, not bilaterally symmetrical, and they lack a notochord and a closed circulatory system.
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