AP BIOLOGY

Detailed explanation-1: -In the animal kingdom, there are two broad phyla that exhibit radial symmetry: One of these is cnidaria, which include jellyfish, anemones, and corals. Jellyfish exhibit radial symmetry in four points around its center. The other phylum is echinodermata, such as sea stars, urchins, and sea cucumbers.

Detailed explanation-2: -Organisms belonging to the phylums Coelenterata, Echinodermata and Ctenophora exhibit radial symmetry.

Detailed explanation-3: -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-4: -Final answer: Body symmetry in Echinodermata is radial.

Detailed explanation-5: -For example, pies, snowflakes, and starfish are radially symmetric because they have many different lines of symmetry (dividing them into matching halves) and the lines cross one another at the center.