Answer: Lenticular transpiration.
- A Stomatal transpiration
- B Lenticular transpiration
- C Cuticular transpiration
- D Root transpiration
Correct answer: B. Lenticular transpiration
Explanation: Lenticels in woody bark allow a minor loss of water vapour - lenticular transpiration.
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.