Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
To tell the name of substance that can move across a barrier by osmosis. water can move across barrier during osmosis.
Osmosis is a special case of diffusion that involves the passive movement of water molecules across a semi-permeable membrane.
It is a passive process.
The internal energy of solvent molecules drives it.
Water molecules move by osmosis.
Other molecules move by the process of simple diffusion.
Gases like O₂ and CO₂; hydrophobic molecules like benzene; small polar uncharged molecules like H2O and ethanol.
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