Question

Which of the following pairs is an incorrect match?

• A. Annelids and arthropods-Bilateral symmetry
• B. Sponges-Acoelomates
• C. Coelenterates and Ctenophores-Radial symmetry
• D. Platyhelminthes-Diploblastic organisation

Answer 1

The Correct Option is D

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).