NEET BIOLOGY

Detailed explanation-1: -Radial symmetry is found in the cnidarians (including jellyfish, sea anemones, and coral) and echinoderms (such as sea urchins, brittle stars, and sea stars).

Detailed explanation-2: -The echinoderms have a radially arranged, pentamerous body structure that is very different from the bilateral body structure of the related deuterostome phyla, the hemichordates and the chordates. Yet, all three phyla evolved from a common bilaterally symmetric ancestor (Eernisse & Peterson 2004; Smith et al. 2004).

Detailed explanation-3: -Echinodermata means “spiny-skinned, ” and this phylum includes such spiny animals as sea stars and sea urchins. The skin covers an internal skeleton. Like cnidarians (e.g., jellyfish and corals), the bodies of echinoderms are organized around a central point; they exhibit radial symmetry.

Detailed explanation-4: -Radial Symmetry This form of symmetry marks the body plans of animals in the phyla Ctenophora (comb jellies) and Cnidaria (corals, sea anemones, and other jellies).

Detailed explanation-5: -Cnidarians have radial symmetry. Echinoderms are bilateral animals that have a 5-part radial symmetry as adults.