Increased concentrations of oxygen.
Photosynthetic bacteria, particularly cyanobacteria, produced oxygen as a byproduct of photosynthesis, which significantly changed Earth's atmosphere and allowed for the development of aerobic life forms.
How did photosynthetic bacteria change Earth's atmosphere?(1 point)
Responses
Increased concentrations of hydrogen.
Increased concentrations of hydrogen.
Increased concentrations of carbon dioxide.
Increased concentrations of carbon dioxide.
Increased concentrations of methane.
Increased concentrations of methane.
Increased concentrations of oxygen.
1 answer