Which one of the following statements about xylem vessels in plants is not correct? | UPSC CAPF 2026 Q No 98

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Which one of the following statements about xylem vessels in plants is not correct?

Options:

  1. Xylem vessels have lignified cell walls.
  2. Phloem sieve tubes are identical to xylem vessels in structure.
  3. Dead xylem vessels provide structural support to plants.
  4. Water is transported through xylem vessels.
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Accepted Answer

Accepted Answer: (B) Phloem sieve tubes are identical to xylem vessels in structure.

Topic Covered: Biology and Environmental Science

Key Concept: Ecology, genetics, biotechnology and life processes

The correct choice follows from the standard scientific definition or process involved. “Phloem sieve tubes are identical to xylem vessels in structure.” matches the relevant biological, ecological, chemical or energy concept, while the alternatives conflict with the core principle.

The key is to apply the central fact, formula, definition or relationship tested in the question and then eliminate alternatives that do not satisfy it.

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