Answer: translocation.
- A translocation
- B transpiration
- C respiration
- D filtration
Correct answer: A. translocation
Explanation: Translocation is the movement of sugars in the phloem.
Water can travel through cell walls (apoplast) or cell-to-cell through the cytoplasm (symplast) - but the Casparian strip at the endodermis blocks the apoplast route entirely, forcing everything through a selectively permeable membrane (symplast) before it can enter the xylem.
Concept context
Water and mineral absorption, the ascent of sap, transpiration, and phloem transport via the pressure flow hypothesis.