Question

Which one of the following statements pertaining to a plant structure is correct?

• A. Cork lacks stomata, but lenticels carry out transpiration.
• B. Cork lacks stomata, but lenticels carry out transpiration.
• C. Passage cells help in the transfer of food from the cortex to the phloem.
• D. Sieve tube elements possess cytoplasm but no nuclei.

Answer 1

The correct option is D

Sieve tube elements possess cytoplasm but no nuclei.

Sieve tube elements are the phloem elements. They are long tube-like structures arranged longitudinally. They are in association with the companion cells. The end walls are perforated in a sieve manner to from sieve plates.

Each cell lacks a nucleus, but it has a large vacuole and the peripheral cytoplasm.