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Assertion: Ambulacral system plays a maj...

Assertion: Ambulacral system plays a major role in locomtion of echinoderm.
Reason: Hydraulic pressure of fluid and contraction of muscle of tube feet make possible movement of echinoderm.

A

Assertion is correct, reason is correct, reason is a correct explanation for assertion.

B

Assertion is correct, reason is correct, reason is not a correct explanation for assertion

C

Assertion is correct, reason is incorrect

D

Assertion is incorrect, reason is correct.

Text Solution

Verified by Experts

The correct Answer is:
A
The water vascular system is a unique organ system that functions in locomotion, feeding, respiration and excretion. Ambulacral canal is connected to outside through external tube feet. Hydraulic pressure off luidand contraction of muscle of tube feet make possible movement of Echinoderm
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