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Question

Water vascular system, five arms spinous skin is found in

A
Echinodermata
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B
Arthropoda
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C
Protochordata
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D
Mollusca
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Solution

The correct option is A Echinodermata
Echinoderms are spiny skinned animals possesses a unique water vascular system, which is a network of fluid-filled canals derived from the coelom (body cavity) that function in gas exchange, feeding, sensory reception and locomotion. The appendages usually occurs in multiples of fives. Hence, option A is correct.

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