Question

The process of diffusion is involved in

• A. respiration
• B. photosynthesis
• C. transpiration
• D. all of these

Answer 1

Answer: (D)

all of these

Answer 2

Diffusion keeps the cell walls of the internal plant tissues moist. It is a means of spreading of ions and other substances throughout the protoplast. Transpiration or loss of water in vapour forms is a diffusion process. Exchange of gases ($CO_2$ and $O_2$) during photosynthesis and respiration between the plant interior and outside air also occurs through diffusion.