Answer:
The correct answer is it occurs naturally by diffusion.
Explanation:
Diffusion is one of the most important passive transport mechanism which helps in the movement of small molecules and gases across the plasma membrane down their concentration gradient.
In simple words diffusion deals with the transport of small molecules and gases from the region of high concentration to the low concentration region untill the contration of both the regions become equal.
In the leaf, excess glucose is rapidly converted to starch. During photosynthesis, plants produce glucose and oxygen, reacting with water and Carbon dioxide i.e. CO2. But, during this process, plants often change some of the glucose into starch, for storage.Aug 17, 2017