Question

Aristotle's lantern occurs in class

• A. echinoidea
• B. asteroidea
• C. holothuroidea
• D. ophiuroidea.

Answer 1

The Correct Option is A

To answer the question about the occurrence of Aristotle's lantern, we need to understand the concept and the classification of certain marine animals.

Aristotle's Lantern is a specialized feeding apparatus found in sea urchins, which are a part of the class Echinoidea. This structure is composed of calcareous plates and muscles, and it functions to scrape, cut, and chew food items such as algae.

Let's explore each of the options given:

1. echinoidea: This class includes sea urchins, which possess Aristotle's lantern as a significant anatomical feature used for feeding. Thus, this is the correct option.
2. asteroidea: This class includes starfish, which do not have Aristotle's lantern. They feed using a different mechanism involving the ejection of their stomachs to externalize digestion.
3. holothuroidea: This class includes sea cucumbers, which do not have Aristotle's lantern. They feed by filtering small particles from water or ingesting sediment.
4. ophiuroidea: This class includes brittle stars, which lack Aristotle's lantern and typically feed on small organisms through a different method involving their arms.

Conclusion: Based on the explanation above, Aristotle's lantern is a characteristic feature of the class Echinoidea. Therefore, the correct answer is Echinoidea.