AP BIOLOGY

Detailed explanation-1: -(i) A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable.

Detailed explanation-2: -A membrane which allows certain substances to pass through it, but not others is called a selectively permeable membrane.

Detailed explanation-3: -Semi-permeable membrane-A membrane through which only smaller molecules like water can pass but not the bigger molecules like solutes is known as semi-permeable membranes (SPM).

Detailed explanation-4: -A semipermeable membrane allows only solvent molecules to pass through while leaving behind solute molecules. Such type of diffusion of water through a semi-permeable membrane is called osmosis.