The Total Change in Concentration of Carbon Dioxide with Depth

question 25

Multiple Choice

The total change in concentration of carbon dioxide with depth is small because

• A) carbon dioxide combines with water to form carbonic acid and bicarbonate.
• B) decay occurs at all depths.
• C) photosynthesis occurs only at the surface.
• D) carbon dioxide is added directly from the atmosphere.
• E) carbon dioxide reacts with oxygen.

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