Rills are ____. A)steep slopes where soils form slowly B)flat ...

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Rills are ____.
 A)steep slopes where soils form slowly
 B)flat areas where soils form slowly
 C)rocky areas where soil formation is difficult
 D)shallow enough to be eliminated by plowing
 E)too deep to be eliminated by plowing

Question 2

At the end of the Permian, the marine invertebrates suffered the greatest extinction with about 90 percent loss of species.
  Indicate whether the statement is true or false

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Answer to Question 1

D

Answer to Question 2

False

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