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reactions in which large complex molecules are broken down to form smaller,simpler molecules;these reactions usually release energy
a mass of undifferentiated cells resulting from uncontrolled mitotic cell division in body...
an atmospheric gas made of three oxygen molecules bonded together (O3).
the seepage of acidic, contaminated water from disused mines and mine dumps.
involuntary muscle found in the walls of blood vessels, in digestive, respiratory, urinary and...