SSC MTS EXAM

Detailed explanation-1: -A substance diffuses over a membrane by passive transport as it diffuses along its concentration gradient without requiring any energy from the cell. The two types of passive transport are : Simple diffusion and facilitated diffusion .

Detailed explanation-2: -The passive forms of transport, diffusion and osmosis, move materials of small molecular weight across membranes.

Detailed explanation-3: -Osmosis is a form of passive transport when water molecules move from low solute concentration(high water concentration) to high solute or low water concentration across a membrane that is not permeable to the solute. There is a form of passive transport called facilitated diffusion.