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Aristotle's Lantern occurs in class...

Aristotle's Lantern occurs in class

A

Echinoidea

B

Asteroidea

C

Holothuroidea

D

Ophiuroidea

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**Step-by-Step Solution:** 1. **Identify the term "Aristotle's Lantern":** Aristotle's Lantern is a complex mouth apparatus used for chewing and biting food. It is specifically associated with certain marine organisms. 2. **Determine the organisms that possess Aristotle's Lantern:** This structure is primarily found in sea urchins, which are echinoderms. 3. **Classify the organisms:** Sea urchins belong to the class Echinoidea within the phylum Echinodermata. 4. **Analyze the options provided:** The question presents different classes, and we need to identify which one includes sea urchins. The options are: - A) Echinoidea - B) Asteroidea (starfishes) - C) Holothuroidea (sea cucumbers) - D) Ophiuroidea (brittle stars) 5. **Select the correct answer:** Among the options, only the class Echinoidea includes sea urchins, which possess Aristotle's Lantern. Therefore, the correct answer is option A) Echinoidea. 6. **Conclude the answer:** Aristotle's Lantern occurs in the class Echinoidea. ---
**Step-by-Step Solution:** 1. **Identify the term "Aristotle's Lantern":** Aristotle's Lantern is a complex mouth apparatus used for chewing and biting food. It is specifically associated with certain marine organisms. 2. **Determine the organisms that possess Aristotle's Lantern:** This structure is primarily found in sea urchins, which are echinoderms. 3. **Classify the organisms:** Sea urchins belong to the class Echinoidea within the phylum Echinodermata. ...
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Assertion: In eukaryotes, transcription occurs in nucleus. Reason: In bacteria, transcription occurs in cytoplasm.