Answer:
A. Osmosis occurs through a semipermeable membrane. Diffusion occurs through a permeable membrane.
Explanation:
Diffusion is the transport of membrane permeable substances. These, in solution, can flow from the inside out of the cell or vice versa spontaneously. This process occurs from a region with higher particle concentration to one with lower concentrations. Gas exchange between blood and tissues is an example of this type of transport.
On the other hand, osmosis is a process of diffusion of water through a semipermeable membrane and occurs from the less concentrated to the most concentrated solution. This process is a type of passive transport because during osmosis the cell does not waste energy.
Based on this, we can say that what makes osmosis different from diffusion is that osmosis occurs through a semipermeable membrane, whereas diffusion occurs through a permeable membrane.
