Question
Thu September 03, 2009 By:

definition

Expert Reply
Sun September 06, 2009

Osmosis is the diffusion of water molecules through a semipermeable membrane from a region of higher water concentration to a region of lower water concentration.

Diffusion is the process in which there is movement of a substance from an area of its high concentration to an area of its lower concentration.

Ascent of sap is the movement of water and minerals from roots to the upper parts of the plant. 

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