Question

capillary action is one of the forces that moves water from the roots of a plant to its leaves. water moves through plant cells called xylem cells. xylem cells are arranged vertically in long, thin columns. the adhesive forces between water molecules and cell walls are stronger than the cohesive forces between water molecules. as water moves along xylem cell walls, cohesive forces help keep water molecules together. so, both adhesive and cohesive forces help move water from the roots of a plant through its stem to its leaves. select the true statements. hydrogen bonding between water molecules holds water together as it moves up xylem cells. water moving up through xylem cells is not affected by gravity. adhesion between water molecules and xylem cell walls helps water move vertically in plants. cohesive forces must be stronger than adhesive forces for capillary action to occur.

Explanation:

• Hydrogen bonding between water molecules (cohesive force) holds water together as it moves up xylem cells. This is consistent with the description in the text.
• Water moving up through xylem cells is affected by gravity. The text does not state it is not affected, so this statement is false.
• Adhesion (adhesive force) between water molecules and xylem cell walls helps water move vertically in plants. This matches the information in the text.
• The text says "the adhesive forces between water molecules and cell walls are stronger than the cohesive forces between water molecules", so the statement that cohesive forces must be stronger than adhesive forces for capillary action to occur is false.

Answer:

• Hydrogen bonding between water molecules holds water together as it moves up xylem cells.
• Adhesion between water molecules and xylem cell walls helps water move vertically in plants.