what are characteristics of echinoderms?
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['They have a star-like appearance and are spherical or elongated.', 'They are exclusively marine animals.', 'The organisms are spiny-skinned.', 'They exhibit organ level of organization.', 'They are triploblastic and have a coelomic cavity.', 'The skeleton is made up of calcium carbonate.']
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These characteristics include: Live in water their entire lives. Vertebrates have a backbone, and some cartilaginous fish have vertebrae made of cartilage rather than calcium-hardened bone. Gills, which are slits on both sides of fish that allow for respiration, or the exchange of oxygen and carbon dioxide.
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['Choanocytes.', 'Water canal (aquiferous) system.', 'Organic and inorganic skeletons.', 'Totipotency.', 'Plasticity.']
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The most distinguishing and prominent feature of Ecdysozoans is their cuticle: a tough, but flexible exoskeleton that protects these animals from water loss, predators, and other aspects of the external environment. All members of this superphylum periodically molt or shed their cuticle as they grow.
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['Skeleton more or less bony, vertebrae numerous.', 'Skin with mucous glands and embedded dermal scales.', 'some without scales.', 'Paired fins.', 'Mouth with many teeth (some toothless).', 'jaws present.', 'Respiration by gills supported by bony gill arches and covered by a operculum.']
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The echinoderms and the chordates are deuterostomes, while all other invertebrates are protostomes. Due to the abundance and calcareous shells of echinoderms, these organisms have been well preserved as fossils.
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['Both have cell;', 'Both respire;', 'Both have the capacity of reproduction;', 'Both use energy for vital functions;', 'Both have the capacity of growth and development; and.', 'Both respond to their environment. Thank You.']
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Echinoderms all have a network of nerves called nerve plexus. These nerves run intertwined under the surface of an Echinoderm's skin. Although the echinoderms do not have many well-defined sensory inputs, they are sensitive to touch, light, temperature, orientation, and the status of water around them.
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Chordates are deuterostomes with four unique characteristics which appear some time during the animal's life. These characteristics are the notochord, a dorsal, hollow nerve cord, pharyngeal slits, and a muscular postanal tail.
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Key Concept: Characteristics used to classify stars include color, temperature, size, composition, and brightness.
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['They are multicellular organisms which do not possess chlorophyll.', 'They are eukaryotic organisms.', 'Cell wall is absent.', 'Mode of nutrition is heterotrophic i.e. they depend on other organisms for food.']
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['They are non-motile.', 'They usually reproduce sexually.', 'They follow the autotrophic mode of nutrition.', 'These are multicellular eukaryotes with cell wall and vacuoles.', 'These contain photosynthetic pigments called chlorophyll in the plastids.']
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This group of organisms has the following characteristics: they are aquatic, they have tentacles, they have a single body opening they have two body layers and are, for the most part, radially/biradially symmetrical.
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Although they do not have a backbone, larval tunicates have four of the identifying characteristics of a Chordate - notochord, dorsal hollow nerve cord, gill slits, and a postanal tail. ... Most tunicates are not free to move around and their body is covered by an exoskeleton called a tunic.
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['Habitat. aquatic, generally marine.', 'Symmetry. mostly asymmetrical.', 'Level of organisation. cellular level of organisation.', 'Water canal transport. Water enters through minute pores called ostia. ... ', 'Choanocytes. the collar cells that line the spongocoel and the canals.', 'Digestion. ... ', 'Skeleton. ... ', 'Hermaphrodite.']
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Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars vary in their chemical composition.
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['They do not have a backbone.', 'They are multicellular. ... ', 'They have no cell walls, like all other animals.', 'They reproduce by two reproductive cells, or gametes, coming together to produce a new organism of their species.']