The process by which water moves through a semi-permeable membrane from a region of high concentration to a region of lower concentration, there by equalizing water concentration is called:

• The process by which water moves through a semi-permeable membrane from a region of high concentration to a region of lower concentration, there by equalizing water concentration is called Osmosis.

Following are the uses of Osmosis:

1. Plants are able to absorb water from soil. The roots of the plant have a higher solute concentration than the surrounding soil, so water flows into the roots. 

2. In plants, guard cells are affected by osmosis. These cells open and close to allow gas exchange.