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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.
the part of the atmosphere that contains the ozone layer and is about 10 km above the Earth's...
the cavity used for transport purposes. It has one opening to the environment through which...
the clear colourless fluid that occurs in the spaces, such as the ventricles and central canal,...