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kingdom of multicellular eukaryotic organisms that do not have cell walls, feed heterotrophically and are motile. All higher animals reproduce sexually.
broad group (taxon) in the biological classification system, which is then divided into kingdoms...
a gland which secretes substances, usually enzymes, through a duct directly to the part of the...
biological classification group (taxon) for animals that is divided into classes. The plural of...
the hormone produced by the beta cells of the Islets of Langerhans in the pancreas, which...