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immobile or fixed in one place.
the process in which micro-organisms, such as yeast, convert sugars into alcohol under anaerobic...
the seepage of acidic, contaminated water from disused mines and mine dumps.
a disease caused when the body's immune system destroys other body cells.
elongated cells in the xylem of vascular plants that transport water and mineral salts.
a molecule that is formed when oxygen and haemoglobin combine chemically.