what are characteristics of deep water animals?
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The term deep sea creature refers to organisms that live below the photic zone of the ocean. These creatures must survive in extremely harsh conditions, such as hundreds of bars of pressure, small amounts of oxygen, very little food, no sunlight, and constant, extreme cold.
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['Animals are multicellular eukaryotes that lack cell walls.', 'All animals are heterotrophs.', 'Animals have sensory organs, the ability to move, and internal digestion. They also have sexual reproduction.']
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['Their body is dorsoventrally flattened.', 'They exhibit bilateral symmetry.', 'Also, they are triploblastic, with three germ layers.', 'They do not have a body cavity and are acoelomate.', 'The body is soft and unsegmented.', 'They are mostly parasitic with a few free-living.']
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['Have a back bone and are considered vertebrates.', 'Are cold-blooded, which means they are unable to regulate their own body temperature.', 'Spend part of their lives in water and on land.']
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['Ectothermic. ... ', 'Dry scales (impermeable to water) shared several times a year, toes with Clauss, body plan better adapted to living on land. ... ', 'Paired limbs. ... ', 'Bone. ... ', 'Carnivores and herbivores. ... ', 'Lungs are spongy, allows for more gas exchange most reptiles have two, snakes only have one lung.']
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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.', 'They have muscle cells due to which they have the capability to contract and relax the body parts.']
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Marine animals are usually osmoconformers, while freshwater species are generally osmoregulators. The sharks' bodies are particularly high in urea and trimethylamine N-oxide.
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1: Defining characteristics of chordates: In chordates, four common features appear at some point during development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
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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.']
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['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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['Unsegmented soft body with bilateral symmetry.', 'Presence of an internal or external shell.', 'A toothed tongue (made mostly of chitin) called the radula.', 'A mantle which is a fold in the body wall that lines the shell.', 'Muscular foot (and/or tentacles in some).']
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List the four basic characteristics used for animal identification. Distinctive markings, sounds, movement and group behavior.
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['They are bilaterally symmetrical.', 'They are triploblastic, which three layers.', 'They show organ system grade of organisation.', 'The body is soft and unsegmented.', 'Body is divisible into three regions – head, a visceral mass, and ventral foot.', 'Body is covered by a mantle and shell.']
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['Gills or ability to hold breath underwater for long periods.', "Fins or limbs adapted for swimming, including webbed feet, for animals that don't spend all their time in the water, like otters and beavers;", 'Tails that act as paddles.']
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Lesson Summary Examples of these organisms are sharks, dolphins, turtles, sea cows, crustaceans, shrimp and even squid. These organisms are very strong swimmers and swim against or independently of the current. Nekton organisms don't generally live in deep water.
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['Cartilage Skeleton.', 'Skin covered with dermal denticles.', 'Powerful Jaws.', 'Efficient Liver.', 'Anatomic Tail.', 'Dynamic Fins.', 'Highly Developed Senses.']
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['Fish. The body of the fish is covered in scales and has fins attached to help it move through the water. ... ', 'Amphibians. The skin of amphibians is very thin and must always be kept wet because amphibians breathe through their skin. ... ', 'Reptiles. ... ', 'Birds. ... ', 'Mammals.']