Write notes on: Sieve tubes and tracheids ?
Answers
Answer:
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Sieve tube. 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:
Tracheids, Vessels and Sieve Tubes
Tracheids, vessels and sieve tubes are found in the
vascular tissue
of the plant.
•
Tracheids and vessels are found in the
xylem
tissue and conduct water and dissolved mineral ions from the roots to the aerial parts of the plant.
•
Sieve tubes are found in the
phloem
tissue and conduct organic solutes, for example, sugars and amino acids, up and down the plant, from where theyare synthesised to where they are required.