In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.
Correct answer: B. Apoplast
- A. Tonoplast
- B. Apoplast
- C. Symplast
- D. Vacuolar.
Explanation
The apoplast is the continuous pathway through cell walls and intercellular spaces, but the Casparian strip blocks it at the endodermis. Water and ions must then cross a cell membrane and enter the symplast, so students may choose c by identifying the pathway used after the blockage rather than the one made discontinuous.
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