Answered

Oxygen gas (O2) is produced by plants and algae. What is the source

of oxygen atoms in these molecules?

AWater
BGlucose
CCarbon dioxide
DAtmospheric oxygen
EAtmospheric nitrogen

Verified Answer :

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.