The ratio between the uptake of carbon dioxide by photosynthesis and the release of carbon dioxide by respiration is approximately
A. 0.5 (i.e., half as much carbon dioxide is taken up by photosynthesis as is released by respiration).
B. 5 (i.e., five times as much carbon dioxide is taken up by photosynthesis as is released by respiration).
C. 0.1 (i.e., one-tenth as much carbon dioxide is taken up by photosynthesis as is released by respiration).
D. 2 (i.e., twice as much carbon dioxide is taken up by photosynthesis as is released by respiration).
E. 1 (i.e., about the same).
Answer: E
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