(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.
Thus, during the daytime, oxygen diffuses out and carbon dioxide diffuses in. (b) At night, as photosynthesis does not takes place, oxygen is not produced. Thus, oxygen from the air diffuses into the leaves to carry out respiration. And carbon dioxide produced by respiration diffuses out into the air.
