Biology
haleyrose4444
2016-09-20 20:13:06
what atomspheric gas is used by marine organisms to make their shells
ANSWERS
taytay02
2016-09-21 00:25:33

That would be CO2 also known as carbon dioxide.

DaisyIbbetson
2016-09-21 00:26:48

carbon dioxide is an answers  

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