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structure within the cell cytoplasm that is surrounded by its own membrane and has a specific function in the cell.
an infectious disease of the digestive system that is characterised by diarrhoeaandbloodinthe...
the acidic fluid secreted into the mammalian stomach which contains various digestive enzymes...
a form of potential energy stored in chemical bonds and released in a chemical reaction.
(also called radioactive dating) a method of measuring the age of fossils based on how much...