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any disease that is caused by a virus or a bacterium or any other micro-organism.
the active maintenance of the correct balance of water and solutes in the blood and tissue fluid...
double-membraned, pigmented, cytoplasmic organelles found in plant cells. The organelles have...
a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy,...
undifferentiated mass of tissues that forms when small pieces of the parent plant, called...