AP BIOLOGY

Detailed explanation-1: -Generally, ion and organic solute concentration levels determine the turgor pressure of guard cells and subsequently affect stomatal aperture. Under elevated CO2, stomata tend to close because a greater depolarization seems to appear in GCs.

Detailed explanation-2: -Higher than ambient CO2 concentrations mediate a closure of stomatal pores in plants and conversely, low CO2 concentrations trigger opening of stomatal pores.

Detailed explanation-3: -Since the stomata allows the carbon dioxide to enter and oxygen to exit therefore if there will be sudden increase in carbon dioxide concentration around the leaf will happen then the stomata will get closed so that the excess gas does not enter the cell and this will further decrease the rate of transpiration too.

Detailed explanation-4: -Water stress, high temperatures, and high carbon dioxide concentration causes stomata to close.

Detailed explanation-5: -During those high-carbon-dioxide times, plants that produce fewer stomata will have an advantage and will be common. On the other hand, when carbon dioxide levels are low, plants need many stomata in order to scrape together enough carbon dioxide to survive.