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the breaking down of large, complex food particles into smaller, soluble molecules which can be absorbed by the body.
(also called heterotrophic organisms) organisms that are not able to produce their own organic...
the nerve cells that transmit nerve impulses towards the central nervous system from the...
the active maintenance of the correct balance of water and solutes in the blood and tissue fluid...
two bean-shaped guard cells surrounding a pore in the epidermis of a leaf that allow gases to...