Q: Iron is oxidized to fe2+(aq) at an anodic site on the surface of the iron, which is often an impurity or this? Read this paragraph and choose the correct option from the provided answers: Iron is oxidized to Fe2+(aq) at an anodic site on the surface of the iron, which is often an impurity or a lattice defect. Oxygen is reduced to water at a different site on the surface of the iron, which acts as the cathode. Electrons are transferred from the anode to the cathode through the electrically conductive metal. Water is a solvent for the Fe2+ that is produced initially and acts as a salt bridge. Rust (Fe2O3xH2O) is formed by the subsequent oxidation of Fe2+ by atmospheric oxygen. In the corrosion process, iron metal acts as the anode in a galvanic cell and is oxidized to Fe2+; oxygen is reduced to water at the cathode. The relevant reactions are as follows:. Choices: - displacement defect - spontaneous mutation - ladder complex - lattice defect A:
lattice defect

Q: Each megasporangium has a single functional one of what? Read this paragraph and choose the correct option from the provided answers: Choices: - antispore - spicule - cocklebur - megaspore A:
megaspore

Q: Where does most geological activity take place? Read this paragraph and choose the correct option from the provided answers: Most geological activity takes place at plate boundaries. This activity includes volcanoes, earthquakes, and mountain building. The activity occurs as plates interact. Giant slabs of lithosphere moving around can create a lot of activity! The features seen at a plate boundary are determined by the direction of plate motion and by the type of crust found at the boundary. Choices: - plate buildings - plate waves - plate medians - plate boundaries A:
plate boundaries