Symmetry and apply it to different groups of animals found at the Seymour Center. Skin Radial Symmetry in 5 Sections around mouthstomach Soft body Many have. Modern Biology Active Reading Worksheets Section 32-1 121 Back Lesson Print. What animals in nature can you think of that are symmetrical Let's think of a few. Cephalization occurs in all bilaterally symmetrical animals because there is an. Sponges Porifera do not have distinct tissues-- their whole body is organized as a.