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The **apoplast pathway** of water movement in roots is:
ACell-to-cell through plasmodesmata (living symplasm)
BThrough cell walls and intercellular spaces (non-living regions), bypassing the cytoplasm — blocked by Casparian strip at endodermis
CThrough xylem only
DThrough phloem only
Answer & Solution
Correct answer: B. Through cell walls and intercellular spaces (non-living regions), bypassing the cytoplasm — blocked by Casparian strip at endodermis
Apoplast = water moves through cell walls and intercellular spaces (non-living continuum). Faster than symplast. Blocked at the endodermal Casparian strip, which forces water to enter living cells (symplastic) before reaching the xylem.
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