Q. In which of the following phyla, while the adult shows radial symmetry, the larva shows bilateral symmetry?
A) Annelida
B) Arthropoda
C) Mollusca
D) Echinodermata
Explanation
Echinoderms are exclusively marine and largely bottom dwellers, enterocoelus coelomate, triploblastic animals. The adult echinoderms have pentamerous radial symmetry derived from an original bilateral symmetry.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.