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reactions in which large complex molecules are broken down to form smaller,simpler molecules;these reactions usually release energy
the seepage of acidic, contaminated water from disused mines and mine dumps.
the body system concerned with the digestion and absorption of nutrients.
the branch of the renal artery which carries blood to the nephron, and branches to form the...
the protection of species, habitats and ecosystems and the management of natural resources.
the space in the middle of the tooth which contains cells, blood vessels and a nerve.