How do deep-ocean trenches form?
A) Magma from a partially melting tectonic plate makes its way through the crust.
B) Subducting lithosphere descends into the mantle.
C) Two tectonic plates diverge and create a rift valley.
D) Sediments from a turbidity current settle out in a deep ocean basin.
Answer: B
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Discuss the development of the various groups of small mammals during the Cenozoic. What will be an ideal response?
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A) wheat straw B) oat straw C) wood D) switchgrass E) corn
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