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a clear, colourless solution of hydrogen chloride (HCl) in water. It is a strong and highly corrosive mineral acid.
living ground tissue with thick-walled cells that gives strength, support and protection to a...
the active maintenance of the correct balance of water and solutes in the blood and tissue fluid...
biological classification group (taxon) that is divided into species (the plural of genus is...
a pure substance made of only one type of atom. An element cannot be broken down into simpler...
rhythmical wave-like muscular contractions of a duct in order to cause movement of substances...