2026 · Q98
Which one of the following statements about xylem vessels in plants is not correct?
general-sciencebiology-plants
- AXylem vessels have lignified cell walls.
- BWater is transported through xylem vessels.
- CDead xylem vessels provide structural support to plants.
- DPhloem sieve tubes are identical to xylem vessels in structure.
Explanation
Xylem vessels have lignified walls, transport water, and being dead at maturity provide structural support — options A, B and C are correct. Phloem sieve tubes, however, are living cells without lignified walls, specialised for translocating food — they are not identical to xylem vessels in structure. Option D is therefore not correct.