During which part of aerobic respiration is oxygen used?

Why are photosynthesis and cellular respiration often considered opposites?

A. Photosynthesis produces twice as many ATP molecules as cellular respiration does. B. Water is released during photosynthesis and consumed during cellular respiration. C. Photosynthesis occurs during the day, and cellular respiration occurs at night. D. Oxygen is produced during photosynthesis and used during cellular respiration.
Answer:

I teach science. They are more properly considered to be complimentary.

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It would be "D." Here are the chemical reactions for each: Photosynthesis: 6 CO2 + 6 H2O >> C6H12O6 + 6 O2 Respiration: C6H12O6 + 6 O2 >> 6 CO2 + 6 H2O

Former MN Science Teacher --sDg

D. Oxygen is produced during photosynthesis and used during cellular respiration.

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