what are the distinguishing characteristics of the phylum nematoda?
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Phylum Nematoda consists of the nematodes or roundworms. They are characterized by their long, thin, tube-like appearance that lacks a visually distinct head or tail. Nematodes are mostly microscopic and are found in nearly every environment (excluding the dry ones) and as parasites of a variety of plants and animals.
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Arthropoda is a phylum of animals that includes many well-known invertebrates such as insects, crustaceans, spiders, centipedes, millipedes and scorpions. ... The distinguishing features of arthropods from other invertebrates are their hard exoskeleton or shell and jointed limbs.
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['The basic form consists of multiple segments, each of which has the same sets of organs and, in most, a pair of parapodia that many species use for locomotion.', 'Segmented worms have a well-developed body cavity filled with fluid.']
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Nematodes are broadly categorized into two main groups: free-living and parasitic. Free-living nematodes feed on organisms in their environment. Parasitic types feed off of a host and some also live within the host.
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Roundworms are invertebrates in Phylum Nematoda. Roundworms have a pseudocoelom and complete digestive system. They are free-living heterotrophs or parasites.
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The two most prominent features that distinguish roundworms from flatworms are the presence of a pseudocoelom, or partially developed body cavity, and a complete digestive tract with two openings, a mouth and an anus.
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Roundworms, also known as nematodes, are parasitic worms that comprise the phylum nematoda. This phylum is made up of at least 25,000 known species, and some scientists believe the actual number could be much higher. They can be found everywhere, including in topsoil and in the water.
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Flatworms are invertebrates in Phylum Platyhelminthes. Flatworm adaptations include mesoderm, muscle tissues, a head region, and bilateral symmetry. Flatworms are free-living heterotrophs or parasites.
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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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The distinguishing feature of arthropods is the presence of a jointed skeletal covering composed of chitin (a complex sugar) bound to protein. This nonliving exoskeleton is secreted by the underlying epidermis (which corresponds to the skin of other animals).
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Nematodes are tiny roundworms that may be parasitic. Nematodes have bilateral symmetry, which means there is a line lengthwise that can divide them into two equal halves that are mirror images. The heads of nematodes have radial symmetry which means that any line drawn through the center produces mirror images.
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Explanation: There are four unique characteristics that an organism must have at some point in their life history to be classified as a chordate. These include a notochord or dorsally located support rod, a dorsally located nerve cord that is filled with fluid, pharyngeal pouches and a postanal tail.
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Characteristics. All worms are bilaterally symmetrical, meaning that the two sides of their bodies are identical. They lack scales and true limbs, though they may have appendages such as fins and bristles. Many worms have sense organs to detect chemical changes in their environments, and some have light-sensing organs.
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Animals belonging to phylum Chordata are fundamentally characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits. They are bilaterally symmetrical, triploblastic, coelomate with organ-system level of organisation.
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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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Silverfish, scorpion, dragonfly and prawns are the organisms which belong to the phylum Arthropoda. The characteristic of arthropod is the presence of hard exoskeleton. The exoskeleton is made up of chitin. They have a segmented body and jointed appendages.
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As chordates, all vertebrates have a similar anatomy and morphology with the same qualifying characteristics: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.