Question
Thu August 09, 2012 By:
 

WHAT ARE SIEVE TUBES?WHAT ARE ITS MAIN FUNTIONS?

Expert Reply
Mon August 13, 2012
Sieve tubes are elements of phloem. They are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. The main function of sieve tubes is to transport sugars and nutrients up and down the plant.
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