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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
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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

User Anna Pawlicka
by
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1 Answer

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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.
User Eric Wright
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