Question

Sieve tubes are the living cells of which thing?​

Answer 1

Answer:

sieve tubes are elements of phloem

Answer 2

Answer:

Sieve tube, in flowering plants, elongated living cells (sieve-tube elements) of the phloem, the nuclei of which have fragmented and disappeared and the transverse end walls of which are pierced by sievelike groups of pores (sieve plates). They are the conduits of food (mostly sugar) transport.

Explanation:

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