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Question
Which of the following classes is characterized by the star-like body with arms sharply marked off from the central disc?
Which of the following classes is characterized by the star-like body with arms sharply marked off from the central disc?
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Solution
The correct option is A Ophiuroidea
Ophiuroidea is a large group so echinoderms that include the brittle stars and the basket stars. Ophiuroidea usually has five arms and superficially resembles true starfish (Asteroidea). However, they have long flexible arms and a central armoured, disk-shaped body that is clearly demarcated from the arms. Therefore, the correct answer is option A.
Ophiuroidea is a large group so echinoderms that include the brittle stars and the basket stars. Ophiuroidea usually has five arms and superficially resembles true starfish (Asteroidea). However, they have long flexible arms and a central armoured, disk-shaped body that is clearly demarcated from the arms. Therefore, the correct answer is option A.
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