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a disease-causing organism, for example bacteria.
an area of land set aside for the dumping of waste.
a disease caused by the bacterium Vibriocholera, which produces a toxin in the lining of the...
to be unable to breathe, or to have a lack of oxygen.
found in the cell wall of xylem cells where the secondary cell wall is absent but the primary...
fats that are liquid at room temperature. They are found in plants.