In the given figure of phloem tissue, identify the marked part (1, 2 a – McqOptions

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1.	In the given figure of phloem tissue, identify the marked part (1, 2 and 3) which help in maintaining the pressure gradient in the sieve tubes.
A.	1
B.	2
C.	3
D.	None of the above
Answer» D. None of the above

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