Through which structures does most transpiration occur?
Answer and explanation
Correct answer: B. Stomata
- Step 1: Transpiration is the loss of water vapour from aerial parts of terrestrial plants.
- Step 2: Between of total foliar transpiration occurs through microscopic leaf pores called stomata, which are regulated by pairs of osmotic guard cells.
Answer
Stomata.
Why not the others: 'Lenticels only' account for less than of transpiration through woody bark pores; 'Root hairs' function in water and mineral absorption from soil rather than transpiration; 'Xylem vessels' are internal vascular conduits transporting water internally rather than evaporating it to the atmosphere.
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