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Fernandes, Francisca Maria; de Carvalho, Luis Mendonca; Silveira, Margarida – Primary Science Review, 2006
At home, children often have pets that they take care of and play with; even in the classroom it is not uncommon to find a wormery, an aquarium or an ant farm. However, children rarely have the opportunity to own and care for a plant over a lengthy period of time, let alone a tree. The authors describe a project in Portugal aimed at improving…
Descriptors: Constructivism (Learning), Plants (Botany), Elementary School Science, Foreign Countries
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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