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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.
double-membraned, pigmented, cytoplasmic organelles found in plant cells. The organelles have...
invisible, short-wave radiation emitted by the sun, which can cause cancer in humans.
(also called macromolecules) large, more complex molecules formed when monomers join together....
part of the skeleton consisting of the skull, vertebral column, sternum and ribs.