Question

question 20
osmosis is characterized by the movement of:
a moving solids across the cell membrane
b solid particles from areas of low concentration to high concentration
c movement of water molecules from areas of high water concentration to low water concentration
d solid particles from areas of high concentration to low concentration

Explanation:

Osmosis is a process in which water molecules move across a semi - permeable membrane (like the cell membrane). The movement is from an area where there is a higher concentration of water (lower solute concentration) to an area with a lower concentration of water (higher solute concentration). Option A is incorrect as osmosis is about water, not solids. Option B is wrong because solid particles moving against the concentration gradient (low to high) is not osmosis (it would require active transport for solids in some cases). Option D is about solid particles moving down the concentration gradient, which is diffusion of solids, not osmosis.

Answer:

C. movement of water molecules from areas of high water concentration to low water concentration