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Author Question: Currently, the greatest supply of natural gas in the United States is A) associated with ... (Read 21 times)

KimWrice

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on: Jul 16, 2018
Currently, the greatest supply of natural gas in the United States is
 
  A) associated with petroleum deposits.
  B) in gas-rich shale.
  C) obtained by chemically converting petroleum into methane.
  D) in deposits of coal lying under Arizona and California.

Question 2

Which of the following best describes ecotones?
 
  A) They contain only species found in the bordering ecosystems.
  B) They have the same abiotic characteristics as the bordering ecosystems.
  C) They consist of many distinct landscapes.
  D) They are transitional regions between ecosystems and may contain unique species.


britb2u

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Reply #1 on: Jul 16, 2018
Answer to Question 1

B

Answer to Question 2

D


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