Biologyhard · Past Paper
What is the main function of the 'Casparian strip' found in roots?
ATo speed up water transport
BTo block water and minerals from leaking back
CTo provide mechanical strength
DTo store starch
✓ Correct Answer: B — To block water and minerals from leaking back
The Casparian strip in the endodermis forces water to pass through the cell membrane, regulating nutrient uptake.
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