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outline about echinoderms, birds, and mammals !!!! Echinoderms, Birds, and Mammals Chapters: 34, 39, 40 I.         Diversity- Echinodermata ('Spiny-Skin')         A.         Characteristics                  1.         undergo metamorphosis from free- swimming larva to bottom dwelling adult. five radii(pentaradial symmetry)                  2.         endoskeleton, calcium plates, include protruding spines                  3.         water- vascular system (water- filled canals)                  4.         tube feet, aid in movement, feeding, respiration, and excretion                  5.         no circulatory, respiratory or excretory systems                  6.         nervous system, but no head or brain                  7.         two sexes, reproduce sexually or asexually         B.         Evolution and Classification                  1.         500 …

…bears and other members are omnivorous                  9.         Pinnipedia- 34 species                           a.         water dwelling carnivores                           b.         adapted for efficient swimming                  10.         Artiodactyla and Perssodactyla- 165 species                           a.         ungulates (hoofed mammals), with even number of toes belong to Artiodactyla, odd number of toes make up Perissodactyla                           b.         both orders are herbivores                  11.         Proboscidea- 2 species                           a.         boneless trunked nose or proboscis                           b.         largest land dwellers today                  12.         Primates- 200 species                           a.         most are omnivorous, and have teeth designed for a varied diet                           b.         complex brain