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substance used to test for the presence of starch. It is a mixture of elemental iodine, potassium iodide or sodium iodide, dissolved in a mixture of ethanol and water.
extremely hard, calcium-rich substance which covers the crown of the tooth.
the non-living ground tissue with thick-walled cells that gives strength, support and protection...
simple epithelium with flattened cells found in the inner lining of the mouth, oesophagus and...