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Question
Movable spines used for locomotion occur in
Movable spines used for locomotion occur in
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Solution
The correct option is A Echinus
Echin (sea urchin) is an echinoderm without arms. It is spherical in shape and is covered with spines and tube feet. It moves by pushing against the substratum with the spines and extending the tube feet in the direction of motion.
Ophiothrix locomotes using its arms.
Holothuria does not have limbs, but locomotes with the help of tube feet.
Antedon locomotes using its arms.
So, the correct answer is 'Echinus'.
Echin (sea urchin) is an echinoderm without arms. It is spherical in shape and is covered with spines and tube feet. It moves by pushing against the substratum with the spines and extending the tube feet in the direction of motion.
Ophiothrix locomotes using its arms.
Holothuria does not have limbs, but locomotes with the help of tube feet.
Antedon locomotes using its arms.
So, the correct answer is 'Echinus'.
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