How many vascular tissue arranged in dicot stems?

Vascular tissues consist of xylem and phloem that lie adjacent to each other.

Explanation:

Vascular tissue in dicot stems are assembled in the form of vascular bundles. These vascular bundles consist of Xylem and phloem tissues arranged in ring form where phloem forms the outer ring over the xylem.

Xylem tissues are responsible for conducting water and minerals to plant leaves and phloem is responsible for conducting food to the leaves and other parts of plants.

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explanation:

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.