The oxygen evolved during photosynthesis comes from splitting of
water
carbon dioxide
oxygen
light
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2018
– Experiments using isotopic tracing (specifically, using water labeled with the heavy oxygen isotope ¹⁸O) demonstrated that the ¹⁸O appeared in the evolved oxygen gas, while using carbon dioxide labeled with ¹⁸O resulted in the ¹⁸O appearing in the glucose product, not the oxygen gas.