Question

How do substances like carbon dioxide (CO${}_2$) and water (H${}_2$O) move in and out of the cell?

• A. Diffusion and osmosis
• B. Osmosis
• C. Facilitated diffusion and diffusion
• D. Active transport

Answer 1

The correct option is A Diffusion and osmosis

• CO${}_2$ is gas so, it moves in and out of the cell by diffusion. Diffusion is a process in which the molecules intermingle due to their kinetic energy and the movement of molecules is from higher concentration to lower concentration.
• H${}_2$O moves in and out of the cell by osmosis,in which the water molecules move from lower solute concentration to higher solute concentration through the cell membrane.

Thus, the correct answer is (A).