Question:medium

Which of the following pairs is an incorrect match?

Updated On: Nov 26, 2025
  • Annelids and arthropods-Bilateral symmetry
  • Sponges-Acoelomates
  • Coelenterates and Ctenophores-Radial symmetry
  • Platyhelminthes-Diploblastic organisation
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The Correct Option is D

Solution and Explanation

Annelids and arthropods: Bilateral symmetry: Correct. Both phyla demonstrate bilateral symmetry.

Sponges: Acoelomates: Correct. Sponges lack a coelom (body cavity).

Coelenterates and Ctenophores: Radial symmetry: Correct. Both phyla exhibit radial symmetry.

Platyhelminthes: Diploblastic organisation: Incorrect. Platyhelminthes (flatworms) are triploblastic, possessing three germ layers (ectoderm, mesoderm, and endoderm). Diploblastic organisms have only two germ layers (ectoderm and endoderm).

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