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the process whereby carbon is turned into carbohydrates in plants, and becomes available as an essential foodstuff.
the phase change of a substance from the solid phase directly into the gas phase without passing...
a pair of electrons shared between two atoms in a covalent bond.
reactions in which an atom or group of atoms is replaced in a molecule by another atom or group...
completes the circuit between the two half-cells in an electrochemical cell.