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the spontaneous, passive movement of water molecules from an area of higher water concentration (higher water potential) to an area of lower water concentration (lower water potential) across a differentially permeable membrane, until the concentration is the same in both regions.
the blood vessel that carries blood from the digestive tract to the liver.
regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
a perforated wall or part of a wall at the end of one of the individual cells making up a sieve...
a species that has a large effect on its environment relative to its abundance and plays an...