Which of the following pairs is an incorrect match?
- Annelids and arthropods-Bilateral symmetry
- Sponges-Acoelomates
- Coelenterates and Ctenophores-Radial symmetry
- Platyhelminthes-Diploblastic organisation
The Correct Option is D
Solution and Explanation
Annelids and arthropods: Bilateral symmetry: Correct. Both phyla exhibit 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, meaning they have three germ layers (ectoderm, mesoderm, and endoderm). Diploblastic organisms only have two germ layers (ectoderm and endoderm).
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