Question

fill in the blank osmosis is the movement of ______ across a cell membrane from high to low (options: oxygen, starch, carbon dioxide, water)

Explanation:

Osmosis is defined as the movement of water molecules across a semi - permeable membrane (like a cell membrane) from an area of higher water concentration (lower solute concentration) to an area of lower water concentration (higher solute concentration). Oxygen and carbon dioxide move across the cell membrane by simple diffusion, and starch is a large molecule that generally does not move across the cell membrane in the context of osmosis.

Answer:

Water