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the splitting of water molecules into oxygen atoms and energy-rich hydrogen atoms to be used in the light-independent phase of photosynthesis.
elongated cells in the xylem of vascular plants that transport water and mineral salts.
an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal,...
substance used to test for the presence of starch. It is a mixture of elemental iodine,...
the part of the cell that controls all the activities of the cell and plays an important role in...