Ans. The water pressure generated by contents inside the cell or protoplasm on the cell wall due to endosmosis is called turgor pressure. Plant erectness helps in stomata opening. Due to turgor pressure, the plant cell wall offers resistance. This resistance, which works in the opposite direction to the turgor pressure but is equal in strength, is called wall pressure. The pressure exerted by the cell wall toward the inside of the cell in a turgid cell. This enables cells to become turgid and bear the pressure without bursting.