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danusha danusha
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Posts: 782
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6 years ago
A high 18oxygen/16oxygen ratio in the shells of marine animals indicates __________.
 
  a. colder temperatures and lower sea levels
  b. higher temperatures and lower sea levels
  c. colder temperature sand higher sea levels
  d. warmer temperatures and higher sea levels
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Replies
wrote...
6 years ago
Answer a
danusha Author
wrote...
6 years ago
A+ for you my friend
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