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5. All the oxygen in the Earth's atmosphere which is used by animals and plants for
respiration, originates as a by-product of
a. respiration b. photosynthesis c. neither

Respuesta :

obash

Answer:

All the oxygen in the Earth's atmosphere which is used by animals and plants for  respiration, originates as a by-product of photosynthesis

Explanation:

During the process of photosynthesis, glucose is majorly obtained as the main product while oxygen remains the bye product. ATP, NADPH, electrons are all produced before oxygen now evolves. The reaction could occur in both light reaction and dark reaction