Formation of the Curved Upper Surface, Such as Occurs in a Tube

question 1

Multiple Choice

Formation of the curved upper surface, such as occurs in a tube filled with water, is an important factor in plant water movement. A curved upper surface is created by ________.

• A) the upward pull of gravity on the water column in the tube
• B) downward pressure from the atmosphere on the topmost layer of water molecules
• C) the water molecules being pulled upward by adhesion to the air
• D) the topmost layer of water molecules being pulled downward by the hydrogen bonds to the water molecules below

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