Question

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

Answer 1

A sieve tube elements are also long, tube-like structures, arranged longitudinally and are associated with the companion cells. Their end walls are perforated in a sieve-like manner to form the sieve plates. A mature sieve element possesses a peripheral cytoplasm and a large vacuole. The functions of sieve tubes are controlled by the nucleus of companion cells.

Sieve elements major function includes transporting sugars over long distance through plants by acting as a channel. Sieve elements elongate cells containing sieve areas on their walls. Sieve elements typically contain cytoplasm but lack a nucleus and contain none to a very small number of ribosomes.

So, the correct answer is 'Sieve tube elements possess cytoplasm but no nuclei.'