Multiple Choice
How do contractile vacuoles help maintain water balance in certain organisms?
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6. The Membrane
Osmosis
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Why does water move into the root hairs of a plant during osmosis?
A
Because root hairs actively pump water into the plant
B
Because the concentration of solutes is higher inside the root cells than in the soil
C
Because water molecules are attracted to the root hairs by chemical signals
D
Because the concentration of water is higher inside the root cells than in the soil
Verified step by step guidance1
Understand the concept of osmosis: Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Identify the concentration gradient: In the context of plant roots, the concentration of solutes is higher inside the root cells compared to the surrounding soil.
Recognize the direction of water movement: Due to the higher solute concentration inside the root cells, water will move from the soil (where solute concentration is lower) into the root cells.
Consider the role of root hairs: Root hairs increase the surface area for absorption, facilitating the movement of water into the plant through osmosis.
Clarify misconceptions: Water is not actively pumped into the root hairs, nor is it attracted by chemical signals; it moves passively due to the concentration gradient established by the solutes.
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