EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -These organisms resemble a pie where several cutting planes produce roughly identical pieces. An organism with radial symmetry exhibits no left or right sides. They have a top and a bottom (dorsal and ventral surface) only. Radial also means there is only one plane in which symmetry exists.

Detailed explanation-3: -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-4: -In the animal kingdom, there are two broad phyla that exhibit radial symmetry: One of these is cnidarians, which include jellyfish, anemones, and corals. Jellyfish exhibit radial symmetry in four points around its center. Also, echinoderms, such as sea stars, urchins, and sea cucumbers.

Detailed explanation-5: -The vast majority of animals, however, exhibit a definite symmetrical form. Four such patterns of symmetry occur among animals: spherical, radial, biradial, and bilateral.