Diffusion is the spontaneous movement of substances from a region of high concentration to a region of low concentration.
Osmosis is the passage of water molecules from a high water concentration region through a selectively permeable membrane to a low water concentration region.
In diffusion, selectively permeable membrane is neither required nor involved while in osmosis, it is involved.
The Skull protects the brain.
Answer:
A
Explanation:
The only way for a cell to use energy stored within a molecule is in this example would be to break the bond between 1 and two because it would be impossible for energy to get to 3, 4, 5.
