The force that holds water together in the form of a stream within the xylem tube is the

The force that holds water together in the form of a stream within the xylem tube is cohesion of water molecules to one another by hydrogen bond. Water molecules are attracted to each other through hydrogen bonds, which create a strong cohesive force. This cohesive force is what allows water molecules to stick together and form a continuous column within the xylem tube, even in the face of gravity. It's this force that helps water move from the roots of plants, up through the xylem, and all the way to the leaves, where it's used in photosynthesis.