The primary functions of the stem are to support the leaves; to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis; and to transport these products from the leaves to other parts of the plant, including the roots.
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Following points are the funtions of a stem.
i) The stems hold the branches , leaves , flowers and fruits .
ii) Stem holds the plant upright.
iii) Stem transports water andĀ minerals from roots to the upper parts of the plant.
iv) Stem also transports the preparedĀ  food made by the leaves to other parts.