Water vascular system is present in coelom in which phylum:
Correct answer: A. Echinodermata
- A. Echinodermata
- B. Annelida
- C. Arthropoda
- D. Cnidaria
Explanation
The water vascular system is a hydraulic system unique to the phylum Echinodermata. It facilitates movement, feeding, and respiration in echinoderms, such as starfish and sea urchins. The other phyla listed-Annelida, Arthropoda, and Cnidaria-do not have this system. Annelida have a closed circulatory system, Arthropoda have an open circulatory system, and Cnidaria have a simple body structure without a vascular system.
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