NEET Biology question

Not in NEET syllabus

How will you distinguish between the methods of transport in xylem and phloem?

(A)Active transport moves xylem but not phloem sap
(B)Transport in xylem is unidirectional and sap moves upward, while phloem sap moves up and downCorrect
(C)Transpiration does not move xylem sap, but it moves phloem sap
(D)Transport of substances takes place from source to sink by both the tissues

Answer: (B)

Solution

Xylem transport of water and minerals is unidirectional, always upward from roots to shoot, driven mainly by transpiration pull. Phloem transport of organic solutes is

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Question ID VK-127798