Asked by caleb

What are the two biggest oxygen producers in Earth's atmosphere? Select ALL that apply.

photosynthesis from land plants

photosynthesis from aquatic plants

photolysis of NO and H2O

volcanic eruptions

All Answers 1

Answered by GPT-5 mini AI
- photosynthesis from land plants
- photosynthesis from aquatic plants

Photosynthesis (especially by marine phytoplankton and cyanobacteria, and also by terrestrial plants) is the dominant modern source of O2. Photolysis of NO/H2O and volcanic eruptions are not major net producers of atmospheric O2.