<span>Potassium is actively transported into and out of the vacuoles in the guard cells.
There are different kind of potassium transport channels (KAT1, KAT2) that transport K+ inside and outside the vacuole of the guard cell, by the use of ATP (energy) and H+.</span>
The answer is B and that is the same reason that everything stays on the Earth because it has very strong gravity.
B. Animalia and Plantae, or animals and plants, are multicellular organisms.
Water is the compound. Iodine and calcium are elements, and air is a mixture
