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Q12: The geographer's concern with the Earth's interior
Q47: After the rainforest is cleared for agriculture,
Q61: Seeds germinate mainly in the _ horizon.<br>A)
Q72: The basic classification of rock types is
Q77: Under natural conditions, the time necessary for
Q78: The food chain is a valuable concept
Q112: Xerophytes are plants of the _ region.<br>A)
Q136: Oxygen isotope analysis is used when studying
Q161: Because of heavy interference by humans, maps
Q166: Gelisols are _.<br>A) old soils with mature