Answer: Guttation.
- A Respiration
- B Translocation
- C Guttation
- D Transpiration
Correct answer: C. Guttation
Explanation: Guttation is the exudation of water droplets, mostly seen on grass blades, when root pressure forces sap out through small pores called hydathodes.
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.