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Q. With reference to phloem elements, consider the following statements:
  1. Sieve tube elements are living cells.
  2. Companion cells are absent in monocots.
  3. Phloem fibres are the only dead elements of phloem.
Which of the above statements is/are correct?
Answer: 1 and 3 only
Notes: Sieve tube elements are living cells in phloem. Companion cells are present in all angiosperms, including monocots, thus statement 2 is incorrect. Phloem fibres are the only dead elements in phloem, providing mechanical support. Therefore, only statements 1 and 3 are correct.
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