In which of the following water vascular system is present?

Porifera only

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Echinodermata only

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Both Porifera and Echinoderma

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None of the above

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Solution

The correct option is B Echinodermata only
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration.
The system is composed of canals connecting numerous tube feet. They move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract. Hence, option B is correct.

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