Final answer:
Adhesion and cohesion are the two processes that help water move up the tubes of plants over great distances.
Step-by-step explanation:
Two processes that help water to move up the tubes of plants over great distances are adhesion and cohesion.
Adhesion is the attraction between water molecules and the inner walls of the plant's xylem tubes, while cohesion is the attraction between water molecules themselves.
These forces help create a continuous column of water from the roots to the leaves, allowing water to be transported against gravity.
Learn more about water movement in plants