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the natural resistances with which a person is born. It occurs because of a body's genetic make-up.
(SO2) a colourless gas that smells of rotten eggs or burnt matches and is produced by...
when an animal accumulates body fat or stores food resources during warmer periods and becomes...
biological classification group (taxon) for plants that are divided into classes.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
simple inorganic chemical substances (mineral salts) that are needed in relatively large amounts...