_____ are the relatively stable and immobile parts of continents and form the foundation on which Phanerozoic sediments were deposited
A)Shields
B)Platforms
C)Cratons
D)Epeiric seas
E)Orogenies
C
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In the concentric zone model of cities, the zone of transition typically begins at the dynamic outer edge of a city's
A) central business district. B) factory area. C) warehouse district. D) residential neighborhoods. E) suburban neighborhoods
Which of the following demonstrates the correct order of the phases involved in a lightning stroke?
A) step leaders, return stroke, separation of charges, flow of negative charge into ground, dart leader B) dart leader, charge separation, flow of negative charge into ground, step leaders, return stroke C) charge separation, dart leader, step leaders, flow of negative charge into ground, return stroke D) charge separation, step leaders, return stroke, flow of negative charge into ground, dart leader
On a worldwide basis, which of the following factors exerts the greatest influence over natural vegetation?
a. climate b. soil c. topography d. humans
Briefly discuss how the evolution of jawed fishes and other predatory creatures affected the marine ecosystem