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| Kingdon, phylum, class, order, family, genus, spcies. |
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| An organism that cannot synthesize its own food and is dependent on complex organic substances for nutrition. |
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| The scientific naming of species whereby each species receives a Latin or Latinized name of two parts, the first indicating the genus and the second being the specific epithet. |
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| Swedish botanist who proposed the modern system of biological nomenclature. |
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| is an organism that produces complex organic compounds from simple inorganic molecules using energy from light or inorganic chemical reactions. |
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| Of or concerning a single taxon of animals. |
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| Relating to or characterized by development from more than one ancestral type. |
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| An animal that lacks a coelom. Acoelomates, which include the flatworm, fluke, tapeworm, and ribbon worm, exhibit bilateral symmetry and possess one internal space, the digestive cavity. |
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| The cavity within the body of all animals higher than the coelenterates and certain primitive worms, formed by the splitting of the embryonic mesoderm into two layers. In mammals it forms the peritoneal, pleural, and pericardial cavities. |
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| Possessing a coelom: a coelomate animal. |
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| Bilateral metazoans characterized by determinate and spiral cleavage, the formation of a mouth and anus directly from the blastopore, and the formation of the coelom by the embryonic mesoderm having split. |
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| Division of the animal kingdom that includes animals that are bilaterally symmetrical, have indeterminate cleavage and a mouth that does not arise from the blastopore. |
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| The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop. |
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| The innermost of the three primary germ layers of an animal embryo, developing into the gastrointestinal tract, the lungs, and associated structures. |
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