NEET Biology question

Not in NEET syllabus

Water will move from the root hair through the cortex to the xylem if the water potentials are:

(A)Root hair-0, Cortex-−2, Xylem-−1
(B)Root hair-0, Cortex-0, Xylem-+1
(C)Root hair-0, Cortex-−1, Xylem-−2Correct
(D)Root hair-0, Cortex-+2, Xylem-+1

Answer: (C)

Solution

For water to move progressively from root hair → cortex → xylem, the water potential must decrease (become progressively more negative) at each step, since water always moves from higher to lower water potential. Only option (c) shows a consistently decreasing sequence: 0

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Question ID VK-127934