That is about as correct as your spelling of professor.
Actually, it is so; there is a detailed explanation in Life and Energy by Issac Asimov PHD ISBN:0-380-00942-0 Avon Books.
A brief explanation from Yahoo answers states:
What exactly converts CO2 to O2 in plants during photosynthesis?
by ecolink Member since:
December 26, 2006
Total points:
59526 (Level 7)
Best Answer - Chosen by Asker
“CO2 isn’t converted to O2, but photosynthesis does take in carbon dioxide to use as a raw material and it does give off oxygen gas as a waste product. The oxygen given off does not come from carbon dioxide. The oxygen comes from splitting water molecules. Photosynthesis keeps the hydrogen ions and the hydrogens’ electrons. The oxygen diffuses out.”
If you really want to get confused, it is also well known that the entire process of uptake of H2O is dependent on free oxygen in the water or soil the roots live.