Question

Explain the term sieve tubes.

Answer 1

Sieve tubes:

1. Sieve tubes are present in vascular plants.
2. They are the elongated living cells of the phloem.
3. The nuclei of sieve tubes are fragmented and disappear.
4. The transverse end walls of sieve tubes are pierced by sieve-like pores.
5. They help in food transport from the leaves to the entire plant.