Question : The presence of oxygen in the atmosphere is due to:
Option 1: Photosynthesis
Option 2: Excretion
Option 3: Nitrogen fixation
Option 4: Respiration
Answer (1)
6th Jan, 2024
Correct Answer: Photosynthesis
Solution : The correct option is Photosynthesis.
Photosynthesis is a mechanism that plants and certain bacteria use to convert carbon dioxide and water into glucose (sugar) and oxygen. This process emits oxygen into the atmosphere and is required for the oxygen-carbon dioxide balance to be maintained.
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