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.