i. It is an essential process in exchange of gases (02 and CO2) during respiration and photosynthesis.
ii. Uptake of minerals is also affected by the process of diffusion.
iii. It helps in removal of excess water by the process of transpiration.
iv. Translocation of organic solutes also takes place by diffusion means.
v. Fragrance of flowers or sweet scent emitted by flowers spread in air by diffusion means attracts insects to materialize pollination.