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Q.

Sea cucumbers belong to which of the following class?

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a

Echinoidea

b

Asteroidea

c

Crinoidea

d

Holothuroidea 

answer is C.

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Detailed Solution

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Sea cucumbers belong to the class Holothuroidea in phylum Echinodermata. These echinoderms are soft-bodied, elongated, and cylindrical in shape. Externally, they show bilateral symmetry and lack arms. Their oral end has tentacles that surround the mouth.

Class Echinoidea includes sea urchins.

Class Asteroidea includes sea stars.

Class Crinoidea includes sea lilies.

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