What Best Describes Biologists' Current Hypothesis About the Production of the Earth's

question 30

Multiple Choice

What best describes biologists' current hypothesis about the production of the Earth's atmospheric oxygen? 

• A) Photosynthesis by terrestrial plants produces atmospheric oxygen. 
• B) The breakdown of iron ore deposits produces atmospheric oxygen. 
• C) Photosynthesis by photosynthesizing bacteria produces atmospheric oxygen. 
• D) Chemosynthesis by aquatic plants produces atmospheric oxygen.

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