AP BIOLOGY

Detailed explanation-1: -Osmosis, facilitated diffusion and simple diffusion do not require energy.

Detailed explanation-2: -Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. B. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.

Detailed explanation-3: -Simple diffusion is the movement of substances from a region of higher concentration to a lower concentration along the concentration gradient without the expenditure of energy. (ATP). Simple diffusion does not require special carrier proteins.

Detailed explanation-4: -Osmosis, facilitated diffusion and simple diffusion do not require energy.

Detailed explanation-5: -Diffusion expends no energy. Rather the different concentrations of materials in different areas are a form of potential energy, and diffusion is the dissipation of that potential energy as materials move down their concentration gradients, from high to low.