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Biology · May / June 2020 · Paper 11 · Question 11

5090Active transport

Which feature of root hairs suggests that they take up ions from the soil by active transport?

  1. ATheir cell membranes are partially permeable.
  2. BThey have a large surface area.
  3. CThey have a lower water potential than the soil.
  4. DThey take up ions more slowly in low oxygen concentrations.

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Correct answer: D. They take up ions more slowly in low oxygen concentrations.

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