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Jaw apparatus is called Aristotle’s Lantern which is present in the Class Echinoidea of the Phylum Echinodermata.

1. a) True for all echinoderms
2. b) True for Echinoidea only
3. c) True for Asteroidea only
4. d) True for Ophiuroidea only

Correct answer: b) True for Echinoidea only

Solution

Aristotle’s lantern is the jaw apparatus found in sea urchins and related echinoids, which belong to Class Echinoidea. It is not a feature of all echinoderms, nor of Asteroidea or Ophiuroidea.

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