1.

If a photosynthesizing plant releases oxygen gas containing O18. It is concluded that the plant has been supplied with: (1) C6H12O6 containing O18 (2) CO2 containing O18 (3) H2O containing O18 (4) Oxygen in the form of ozone

Answer»

Correct option (3) H2O containing O18

Explanation:

Oxygen during photosynthesis comes from the water supplied to the plant during photolysis of water.



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