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JAMB Biology 2001 Question 27

Question 27

Transport in Plants

Salts and water are absorbed in the roots and transported to the leaves by

  1. A.diffusion through the xylem tissues
  2. B.osmosis through the phloem tissues
  3. C.diffusion through the phloem tissues
  4. D.osmosis through the xylem tissues.
Show the answer and explanation

Answer: D (osmosis through the xylem tissues.)

Explanation

Water enters the root by osmosis and moves up to the leaves in the xylem; phloem carries food, not water and salts.