Adhesion is caused by

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(D) Adhesion refers to the physical attraction between water molecules and the polar surfaces of the tracheary elements (like xylem vessels and trache

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Attraction of water molecule to polar surface

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(D) Adhesion refers to the physical attraction between water molecules and the polar surfaces of the tracheary elements (like xylem vessels and tracheids). This force allows water to stick to the walls of the xylem,preventing the water column from breaking due to gravity. In contrast,cohesion is the attraction between water molecules themselves due to hydrogen bonding. Therefore,the attraction of water molecules to polar surfaces is the definition of adhesion.

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