AP BIOLOGY

Detailed explanation-1: -Leaf stomata are the primary sites of transpiration and consist of two guard cells that form a small pore on the surfaces of leaves. The guard cells control the opening and closing of the stomata in response to various environmental stimuli and can regulate the rate of transpiration to reduce water loss.

Detailed explanation-2: -Stomata consist of microscopic pores, each flanked by a pair of guard cells. Guard cells can increase or decrease the size of the pore via changes in their turgor status, hence regulating both CO2 entry into the leaf and transpiration, or the loss of water from the leaf.

Detailed explanation-3: -Stomatal Transpiration It is the evaporation of water from the stomata of the plants. Most of the water from the plants is transpired this way. The water near the surface of the leaves changes into vapour and evaporates when the stomata are open.

Detailed explanation-4: -Stomatal transpiration accounts for almost 90% of the total transpiration. Cuticular transpiration accounts for 5-10 % whereas, lenticular transpiration accounts for 0.1% of the total transpiration.