How are osmosis and diffusion alike in passive transport?

• A. Both involve the net movement of substances down their concentration gradient and do not require cellular energy input (ATP).
• B. Both require membrane transport proteins (channels or carriers) to move molecules across the plasma membrane.
• C. Both move solutes from lower concentration to higher concentration to maintain homeostasis.
• D. Both occur only in living cells and stop immediately when the cell dies.

Answer: (A)