Plants Give Off O₂ Because

question 12

Multiple Choice

Plants give off O₂ because

• A) O₂ results from the incorporation of CO₂ into sugars.
• B) they do not respire; they photosynthesize.
• C) water is the initial electron donor, leaving O₂ as a photosynthetic by-product.
• D) electrons moving down the electron chain bind to water, releasing O₂.
• E) O₂ is synthesized in the Calvin cycle.

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