Plants make glucose when they photosynthesise
Some of the glucose made is used by cells of the plant for respiration which goes on 24/7.
It provides energy for cell functions, reproduction and growth
Glucose is soluble in water so it would affect the water balance in the cells so it is converted to starch which is insoluble for storage
Phloem in the plant transports sugars made by photosynthesis to the rest of the plant. They have thin walls made of living cells
Xylem in the plant transports water and minerals from the soil around the plant. They have thick strong walls that are non-living.
In between the phloem and xylem are cambium cells which grow into new xylem and phloem.
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