Answer: hydrogen bonding.
- A hydrogen bonding
- B ionic bonding
- C only covalent bonding
- D metallic bonding
Correct answer: A. hydrogen bonding
Explanation: Hydrogen bonds hold water molecules together, giving cohesion.
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.