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. adhesion between water molecules helps water climb up the sides of xylem cells. gravity exerts a downward force on water moving up through a plant. for capillary action to occur, adhesive forces must be stronger than cohesive forces. cohesive forces between water molecules help water molecules stick together as water moves up through a plant.

Explanation:

• Adhesion between water molecules helps water climb up the sides of xylem cells: Adhesive forces (between water molecules and xylem cell walls) are what help water adhere to the xylem cell walls and move upwards.
• Gravity exerts a downward force on water moving up through a plant: Gravity acts in the downward direction, opposing the upward movement of water in the plant.
• For capillary action to occur, adhesive forces must be stronger than cohesive forces: As per the text, “The adhesive forces between water molecules and cell walls are stronger than the cohesive forces between water molecules” which is a condition for capillary - like movement in xylem.
• Cohesive forces between water molecules help water molecules stick together as water moves up through a plant: Cohesive forces (between water molecules) keep the water column intact as it moves up the plant.

Answer:

All the statements (Adhesion between water molecules helps water climb up the sides of xylem cells; Gravity exerts a downward force on water moving up through a plant; For capillary action to occur, adhesive forces must be stronger than cohesive forces; Cohesive forces between water molecules help water molecules stick together as water moves up through a plant) are True.