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Q: In addition to being necessary for respiration, _______ also provides UV radiation protection. A. carbon dioxide B. oxygen C. hydrogen D. water
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User: In addition to being necessary for respiration, _______ also provides UV radiation protection. A. carbon dioxide B. oxygen C. hydrogen D. water

User: 1. Dark spots on the photosphere are known as A. sunspots. B. solar wind. C. the chromosphere. D. the corona.

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Asked 6/20/2013 11:15:44 AM
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