Both radial and bilateral symmetry is found in which of the following phylum?

Explanation

Echinoderms exhibit a unique form of symmetry known as pentaradial symmetry in their adult stages. This means that their body parts are arranged in multiples of five around a central axis. This radial symmetry is evident in animals like starfish, sea urchins, and sea cucumbers. However, during their larval stages, echinoderms, especially in the early developmental phases, display bilateral symmetry. This bilateral symmetry is a characteristic of their larval forms and undergoes a transformation as they mature into the pentaradial symmetry seen in the adults.