Microtubles functions include

Explanation:

It gaves shape to the cellular membraneTransportation of specific organelles within the cell.

Giving shape to cells and cellular membranes.
Cell movement, which includes a contraction in muscle cells and more.
Transportation of specific organelles within the cell via microtubule “roadways” or “conveyor belts.”

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By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.