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structure that contains the two centrioles arranged at right angles to each other in animal cells.
the liquid produced by the kidneys consisting mainly of water and nitrogenous wastes such as...
an enzyme that catalyses (speeds up) the hydrolysis (breaking) of a chemical bond.
hormone produced by the pancreas, which catalyses the conversion of glycogen to glucose.
the passage through which the nerve and blood vessels leave the root of the tooth.
a structure that is used by molluscs for feeding. It is a minutely toothed, chitinous ribbon...