Environment & Ecology · Oxygen Cycle
Which process is responsible for the formation of most oxygen on Earth?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Volcanic activity
- 2Decomposition of organic matter
- 3Photosynthesis by plants, algae, and cyanobacteria✓
- 4Cellular respiration in animals and humans
Correct answer
Photosynthesis by plants, algae, and cyanobacteria
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