Answered

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Oxygen gas (O2) is produced by plants and algae. What is the source
of oxygen atoms in these molecules?
A. Water
B. Glucose
C. Carbon dioxide
D. Atmospheric oxygen
E. Atmospheric nitrogen

Sagot :

tadvisohil886
The answer is C. Carbon Dioxide and also A) water

Plants and algae use carbon dioxide and water in presence of sunlight to perfrom photosynthesis. Oxygen is a by-product of this process and is used later by the plant for respiration.
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