Question

question 44 most of the atmospheric oxygen occurs as a result of photosynthesis. from which of the following molecules is the oxygen derived? water carbon dioxide chlorophyll glucose

Explanation:

In photosynthesis, water is split during the light - dependent reactions, releasing oxygen as a by - product. Carbon dioxide is used to make glucose, chlorophyll is a pigment involved in capturing light energy, and glucose is the product of photosynthesis, not the source of oxygen.

Answer:

water