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vascular tissue that conducts food substances from the leaves to other parts of the plant. The cells are living with perforated end plates.
a ductless gland that secretes hormones directly into the bloodstream, to be transported to...
the process of removing salt and other minerals from seawater, to make it drinkable.
biological, chemical, or physical agent that stimulates a characteristic function or causes a...
the destruction of the enamel of a tooth owing to the action of bacteria that live in plaque....