PDF-Sea urchins(Echinoidea)

Sea urchins have globelike bodies with the mouth directed downwards and the anus directed upwards They move on small tubelike feet which end in suckers and have a hard external shell known as a te. by: Rachael Landrie Sea urchins have no brain and therefor have a simple nervous system. The center is a large nerve ring encircling and releasing of sperm/eggs from the gonopores. Sea urchins are, ho SEA URCHINS: In California Susumu Kato Sea urchins, long considered pests in southern California because of their overabundance, are relished by people through ANIMALS WITHOUT BACKBONES. WORMS. Soft bodies. Body divided into segments. Lays eggs. Some Regenerate. Some are parasites. EARTHWORMS. LEECHES. TAPEWORMS. ROUNDWORMS. SPONGES. Have a large space in the middle of their bodies. Harrison Cassidy, Lauren Bower, Ren. ée Carew, . Tosin. . Fashoranti. Introduction. Phylum Echinodermata. Regular and Irregular. Found . in all intertidal . zones. ~1000 known species. Evolutionary History. Bennett (100110937), . Brianna . Corbin (100111811), . Nate . Ells. . (100109466). . Danielle . Visentin (100110678). ECHINOIDEA. ECHINOIDEA. Kingdom: . Animalia. Phylum: . Echinodermeta. Class: . Echinoidea. What is population?. Group of individuals of the same species that live in the same area. Does population change?. Sea otters, kelp, and sea urchins. Kelp forests offer a habitat for sea otters. Sea urchins feed on kelp. Zoe. sharks. Sharks are the most fearsome predatory fish of the seas. There are 375 species living mostly in warm seas. Sharks have a skeleton made of rubbery . cartilage - . most other kinds of fish have bony skeletons.. Cnidaria. Ctenophora. Platyhelminthes. Rotifera. Nematoda. Nemertea. Mollusca. Annelida. Arthropoda. Bryozoa. Phoronida. Brachiopoda. Echinodermata. Chordata. No true tissues. radial symmetry. diploblastic. I. . Echinoderms. A. Origin . of the Phylum name Echinodermata. . 1. . . echino. . = . Spiny. ;. . dermis = . Skin. II. . What is a Echinoderm?. A. . Characteristics of Phylum Echinodermata. . Duckweed . .  . Crabs .  . Herons . The duckweed grows too thick and blocks sunlight in the water. The herons move away because there is nothing to eat. . 2. Hunters wipe out much of the otter population. . Natural Selection. This includes describing how organisms respond to the environment and how organisms are distributed.. Events that occur in the framework of . ecological time. (minutes, months, years) translate into effects over the longer scale of . by Yi Lin and Zoe sharks Sharks are the most fearsome predatory fish of the seas. There are 375 species living mostly in warm seas. Sharks have a skeleton made of rubbery cartilage - most other kinds of fish have bony skeletons. A uditioning AudioVisuals By staff members of the Audio-Visual Center of Indiana University, unless otherwise noted Biological control of snails. 16 mm, sound, color; 1412 min Part . 3. New York: European Starling. From the New York Times, 1990 (cont.). Today the starling is ubiquitous, with its purple and green iridescent plumage and its rasping, insistent call. It has distinguished itself as one of the costliest and most noxious birds on our continent..