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Q.

In which phylum water vascular system is found?

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a

Echinodermata (Sea cucumber)

b

Protozoa

c

Arthropoda

d

Porifera

answer is D.

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Detailed Solution

  • Echinoderms such as sea urchine, sea stars have water vascular system. Its used for locomotion, food and waste transportation and respiration. 
  • Water vascular system is made up of canals connecting numerous tube feet. 
  • Rest of the phyla given do not show presence of water vascular system. 

Hence, the correct answer is option D.

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