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8. Water vascular system is the characteristic of which group of the following:

         (a) Porifera

         (b) Ctenophora

          (c) Echinodermata

          (d) Chordata

Answers (1)

(c). Echinodermata

Water vascular system is a characteristic feature of echinoderms which help in locomotion, respiration and capturing of food. 

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