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tissue that consists of more than one type of cell.
the movement of molecules across a membrane against the concentration gradient, from an area of...
the spontaneous, passive movement of water molecules from an area of higher water concentration...
a foreign substance, usually a protein, that stimulates the production of one or more antibodies...
an area of land which is usually covered with shallow water, and which supports plants adapted...
a hormone produced by the pituitary gland, which helps to limit the amount of water lost from...