(N/A) Diffusion is the passive movement of substances from a region of higher concentration to a region of lower concentration. Diffusion of substances plays an important role in cellular transport in plants.
The rate of diffusion is primarily affected by the following factors:
$1$. Concentration gradient: The difference in concentration between two regions. A steeper gradient increases the rate of diffusion.
$2$. Membrane permeability: The ability of the membrane to allow substances to pass through. The rate of diffusion increases as membrane permeability increases.
$3$. Temperature: An increase in temperature generally increases the kinetic energy of molecules, thereby increasing the rate of diffusion.
$4$. Pressure: Pressure plays a significant role, especially in the diffusion of gases, where substances move from a region of higher partial pressure to a region of lower partial pressure.
Diffusion continues until the concentrations on both sides of the barrier become equal, at which point net diffusion stops.