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    Exam 18: marine Ecosystems Ocean Acidification: the Other Co2 Problem
  5. Question
    What Do Organisms Use to Make Shells
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What Do Organisms Use to Make Shells

Question 64

Question 64

Multiple Choice

What do organisms use to make shells?


A) Ca+2
B) H2O
C) H+
D) CO2
E) CaCO3

Correct Answer:

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