Cnidarians, sponges, and echnoderms all belong to the...?
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They are all invertebrates, ie they don't have backbones
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Easy. Sharks belong within the subphylum Vertebrata.
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Kingdom: Animalia\nPhylum: Annelida\nClass: Clitellata\nSubclass: Oligochaeta\nOrder: Haplotaxida
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Corals: kingdom Animalia\nAlgae: not well classified, some are classified in kingdom Protista some in kingdom Plantae\nBlue-green algae: kingdom Monera\nCandida: kingdom Fungi\nRose (if you mean the flower): Kingdom Plantae
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hookworms and liver flukes are parasites. Leeches might be considered parasites as well, but I'm not sure, the others I am sure of. I think the jellyfish and corals mostly eat zooplankton, that is fish ova and other tiny marine organisms. Sorry I can't help you more.\n\n16 NOV 06, 0339 hrs, GMT.
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Read the information on these sites and maybe you will find some of the answers to your questions.\n\nhttp://www.answers.com/echinoderm%20\nhttp://www.answers.com/topic/tube-foot?hl=echinoderm\nhttp://www.answers.com/Aristotle%E2%80%99s%20Lantern\nhttp://www.answers.com/main/ntquery?method=4&dsid=2222&dekey=Sea+urchin&gwp=8&curtab=2222_1&linktext=sea%20urchins
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Corals (class Anthozoa), which include sea anemones (order Actiniaria), are gastrovascular marine cnidarians (phylum Cnidaria) existing as small sea anemone-like polyps, typically forming colonies of many individuals. The group includes the important reef builders known as hermatypic corals, found in tropical oceans, and belonging to the subclass Zoantharia of order Scleractinia (formerly Madreporaria). The latter are also known as stony corals in as much as the living tissue thinly covers a skeleton composed of calcium carbonate. A coral "head" is formed of many individual polyps, each polyp only a few millimeters in diameter. The colony of polyps function essentially as a single organism by sharing nutrients via a well developed gastrovascular network, and the polyps are clones, each having the same genetic structure. Each polyp generation grows on the skeletal remains of previous generations, forming a structure that has a shape characteristic of the species, but subject to environmental influences.\n\nAlthough sea anemones can catch fish and other prey items and corals can catch plankton, they obtain much of their nutrient requirement from symbiotic unicellular dinoflagellates (type of algae) called zooxanthellae. Consequently, they are dependent upon growing in sunlight and for that reason usually found not far beneath the surface, although in clear waters corals can grow at depths of 60 m (200 ft). Other corals, notably the cold-water genus Lophelia, do not have associated algae, and can live in much deeper water, with recent finds as deep as 3000 m. Corals breed by spawning, with many corals of the same species in a region releasing gametes simultaneously over a period of one to several nights around a full moon.\n\nCorals are major contributors to the physical structure of coral reefs that develop only in tropical and subtropical waters. Some corals exist in cold waters, such as off the coast of Norway (north to at least 69° 14.24' N) and the Darwin Mounds off western Scotland. The most extensive development of extant coral reef is the Great Barrier Reef off the coast of Queensland, Australia. Indonesia is home to 581 of the world's 793 known coral reef-building coral species.\n\n\n\nHydra is a genus of simple, fresh-water animals possessing radial symmetry. Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa.\n\nHydras are low power microscopical life forms and are often studied by biologists due to their regenerative powers. They can be found in most un-polluted freshwater ponds, lakes and streams in the temperate and tropical regions by gently sweeping a collecting net through weedy areas.
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Tarantulas are spiders, spiders are arthropods, and arthropods are eucoelomates. Schizocoelomates, if I remember rightly.
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These are the classes of Chordata : \n\nPhylum Chordata\n\n    * Subphylum Urochordata - Tunicates\n    * Subphylum Cephalochordata - Lancelets\n    * (unranked) Craniata (animals with skulls)\n          o Subphylum Vertebrata (Vertebrates - animals with backbones)\n                + Class Myxini or Hyperotreti (hagfish)\n                + Class Conodonta (Conodonts)\n                + Class Cephalaspidomorphi (Paleozoic jawless fish)\n                      # Hyperoartia (lampreys and kin)\n                + Class Pteraspidomorphi (other Paleozoic jawless fish)\n                + Infraphylum Gnathostomata (jawed vertebrates)\n                      # Class Placodermi (Paleozoic armoured forms)\n                      # Class Chondrichthyes (cartilaginous fish)\n                      # (unranked) Teleostomi (advanced fishes and their descendents)\n                            * Class Acanthodii (Paleozoic "spiny sharks")\n                            * Class Actinopterygii (ray-finned fish - Osteichthyes in part)\n                      # Class Sarcopterygii (lobe-finned fish - Osteichthyes in part))\n                            * Superclass Tetrapoda (four-legged vertebrates)\n                                  o Class Amphibia (amphibians)\n                                  o Series Amniota (amniotic egg)\n                                        + Class Synapsida (mammal-like reptiles)\n                                              # Class Mammalia (mammals)\n                                        + Class Sauropsida - (reptiles)\n                                              # Subclass Anapsida\n                                                    * Order Testudines (turtles)\n                                                    * Subclass Diapsida (most modern reptiles)\n                                                          o Superorder Lepidosauria (lizards, snakes, tuatara)\n                                                          o Division Archosauria ("ruling reptiles")\n                                                                + Order Crocodilia (crocodiles, alligators, caimans, gharials)\n                                                                + Superorder Dinosauria\n                                                                      # Class Aves (birds)
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Normally, it is considered to be Invertebrates the following taxa, though they do not include Hemichordata and Cephalochordata (Which are chordates but not vertebrates):\n\n- Protozoa: unicellular organisms\n- Porifera: sponges\n- Placozoa\n- Orthonectida: (Prev. Mesozoa)\n- Dicyemida: (Prev. Mesozoa)\n- Cnidaria: jellyfish\n- Ctenophora\n- Platyhelmintes: flatworms\n- Nemertea (= Rhynchocoela)\n- Gnathostomulida\n- Rotifera\n- Acanthocephala\n- Micrognathozoa\n- Gastrotrichia\n- Nematoda\n- Nematomorpha\n- Priapula\n- Kinorhyncha (= Echinodera)\n- Loricifera\n- Arthropoda: insects, spiders, crustacea, etc.\n- Annelida\n- Pogonophora\n- Vestimentifera\n- Echiura\n- Sipuncula\n- Mollusca\n- Phorona\n- Ectoprocta (=Bryozoa)\n- Brachiopoda\n- Entoprocta\n- Cycliophora\n- Echinodermata: sea stars, etc.\n\nYou can also include to de list Hemichordata and Cephalochordata.
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Coral and hydra are both in the phylum Cnidaria, but hydra are in the class hydrozoa and most coral in anthozoa.  Hydrozoa have two body stages: medusa and polyp, whereas anthozoa only have one: polyp.  Coral often live in large colonies, whereas hydra do not.  Coral are mostly dependent on food from their symbiotic relationship with algae- not so with hydra (but they can form sybiotic relationships with some algae), therefore depend on growing in sunlight.  Coral can also grow much larger in size.
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Yes. The phylum Annelida consists of the segmented worms. It includes the Classes Polychaeta (many haired worms), Oligocheata (sparcely haired worms), and Hirudinea (leeches).
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Kingdom: Animalia\nPhylum: Chordata\nClass: Mammalia\nOrder: Carnivora\nFamily: Felidae\nGenus: Panthera
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Lobster.  Crab.  Oysters.  Clams.  Mollusks.  Scallops.  Shrimp.  Krill.  Barnacles.  Crayfish.
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The animals from this phylum are called sponges.
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The only one I can think of is the shellfish called mussels.\n\nThese links should help you figure it out.
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Cnidarians live mainly in marine environments. Examples of cnidarians are the jellyfish, sea anemones, and corals. They are different from sponges because sponges have assymmetry which means they have no definite shape. Cnidarians have radial symmetry.