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Assertion : Water vascular system is the...

Assertion : Water vascular system is the characteristic of echinoderms.
Reason : Main function of water vascular system is locomotion.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
B

Water vascular system or ambulacral system is a unique system of echinoderms which helps mainly in locomotion. It is infact a modified part of coelom consisting of a system of canals containing sea water and amoeboid corpuscles. It helps in locomotion by providing a hydraulic pressure mechanism of tube feet may serve for respiratory exchange of gases. Tube feet also help in anchoring the body to substratum and in capturing and handling the food.
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Knowledge Check

  • Water vascular system is a characteristic of

    A
    Porifera
    B
    Ctenophora
    C
    Echinodermata
    D
    Chordata
  • Water vascular System is characteristic of Phylum

    A
    Porifera
    B
    Echinodermata
    C
    Annelida
    D
    Chordata
  • Water vascular system helps in

    A
    locomotion
    B
    capture and transport of food
    C
    respiration
    D
    all of the above
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