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Nightmare7171 Nightmare7171
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6 years ago
A high 18 oxygen/16 oxygen ratio in the shells of marine animals indicates __________.
 
  a. colder temperatures and lower sea levels
  b. higher temperatures and lower sea levels
  c. colder temperatures and higher sea levels
  d. warmer temperatures and higher sea levels
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wrote...
6 years ago
Correct Answer: a
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