Biology for IGCSE & O level - Transport In Plants (Section 5 - No. 32)
Which of the following best explains the movement of water through the root, from the soil to the xylem?
Water enters the root hairs by active transport, then travels through the cortex to the xylem.
Water enters the root hairs by osmosis, then travels through the cortex to the xylem.
Water evaporates from the root hairs and is drawn into the xylem.
Water is actively pumped into the xylem and then moves into the root hairs.
Explanation
Water enters the root hairs by osmosis because the concentration of solutes inside the root cells is greater than in the soil.
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