Reduced endoskeleton and leathery skin is characteristic of

Star fish

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Holothurian

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Sea urchin

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All of the above

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Solution

The correct option is A Holothurian
Holothurians or better known as sea cucumbers, typically have five rows of tube feet and an elongated body which is what gives them their common name. Their endoskeletons are much more reduced than most echinoderms and they lack the spines that other echinoderms have. They are marine animals with a leathery skin.
Therefore, the correct answer is option B.

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