Diffusion,osmosis and active transport
The levels of certain substances need to be controlled in order for the cell to function properly.
"Diffusion" is simple.Its just the gradual movement of particles places where there are lots of particles to places where there are not so much particles.
Diffusion is the passive overall movement of particles to a region of their higher concentration to a region of lower concentration.
when plants photosynthesise they use co2 and produce o2. These gases move in and out of plant leaves by diffusion.
Osmosis is a type…