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Marques, M.; Arrabaca, J.; Chagas, I. – Journal of Biological Education, 2005
Leaves of higher terrestrial plants have small pores--stomata--responsible for gas exchange. The opening of each stoma results from the osmotic uptake of water by two specialised cells--the guard cells. Because of the involvement in this mechanism of ATPase-proton pumps and active transport of ions across membranes, we have designed an Exploring…
Descriptors: Physiology, Biology, Molecular Structure, Cytology