Which of the following groups is not classified as a protostome?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
15 May 2018
Last updated
28 May 2026

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Explanation

Protostomes include arthropods, annelids, mollusks, and nematodes. Hemichordates, however, belong to the deuterostome lineage, distinguishing them from protostomes.

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