AP BIOLOGY

Detailed explanation-1: -Passive transport is diffusion of molecules across a semi-permeable membrane from an area of high concentration to an area of low concentration in order to achieve a balanced concentration.

Detailed explanation-2: -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.

Detailed explanation-3: -Answer and Explanation: The statement given about the passive transport is true. The passive immunity refers to the movement of substance from the higher gradient to the lower gradient. Since the movement happens from higher to lower which does not requires any energy.

Detailed explanation-4: -Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane.

Detailed explanation-5: -Answer and Explanation: This statement is false. Passive transport does not require energy, and active transport does. Passive and active transport both utilize transport proteins to move substances across a cell membrane.