Which of the following groups does not belong to the protostome lineage?

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

Annelida, Arthropoda, and Mollusca are all protostomes, meaning their embryonic development follows the protostome pattern. Echinodermata, however, are deuterostomes, developing differently and thus not part of the protostome group.

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