a transport mechanism where ions or molecules move against a concentration gradient, this movement requires energy. - Active transport, the stress that develops when solutions containing different concentrations of solute in a common solvent are separated by a membrane that is permeable to the solvent, but not the solute. - Hydrostatic pressure gradient, the incapability of water to lose volume in response to pressure. - Incompressibility of water, the diffusion of fluid through a semi-permeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. - Osmosis, the food-conducting tissue of vascular plants that conducts synthesized nutrients to different parts of the plants. - Phloem, an element of phloem tissue consisting of a longitudinal row of thin-walled elongated cells with perforations in their connecting walls through which food materials pass. - Sieve tubes,

IB HL Bio topic 9.2 - Transport in phloem

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