NEET BIOLOGY

Detailed explanation-1: -Answer. Explanation: On a warm dry day, rate of transpiration will increase which will result in faster transport of water and minerals to leaves of trees.

Detailed explanation-2: -We have previously noted Loftfield’s observations that, as water deficiency increases, the stomata close earlier in the day and finally in case of extreme water deficiency reverse their normal behavior and are closed all day and open all night.

Detailed explanation-3: -If plants from a moister region are transferred to a drier region, it is likely that their stomata will remain closed for a longer time, because the time during which stomata are open will be reduced to lower the loss of water via transpiration.

Detailed explanation-4: -By closing the stomatal pore the water use efficiency is increased (Farooq et al., 2009), reducing the amount of water lost per CO2 molecule assimilated. Several mechanisms work together to close the stomata, such as hydro passive closure and chemical signals from the plant stress hormone ABA.

Detailed explanation-5: -2)From stomata, transpiration takes place that is loss of excess water from the aerial parts of the plant. This keeps the plant cool in hot weather. If stomata is absent in leaves then all these functions will not take place. Photosynthesis, Respiration and Transpiration will not occur.