Non-Chordates: Features of Major Phyla · NCERT Biology

The most distinctive feature of echinoderms is the presence of a:

  1. Canal system
  2. Water vascular system
  3. Jointed appendages
  4. Pseudocoelomic cavity
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Correct answer: Water vascular system

Echinoderms possess a water vascular system, which is a network of hydraulic canals. It functions in locomotion, capture and transport of food, and respiration.

Difficulty: Medium Question 15 of 20

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