Photosynthesis by microbes (and later by plants) produced all the oxygen in Earth s atmosphere, and fixed most of the carbon dioxide as complex organic components of living organisms.
(Photosynthesis by microbes (and later by plants; produced; all the oxygen in Earth s atmosphere) (Photosynthesis by microbes (and later by plants; fixed; most of the carbon dioxide as complex organic components of living organisms)
Photosynthesis by microbes (and later by plants Photosynthesis by microbes (and later by plants
produced fixed
all the oxygen in Earth s atmosphere
most of the carbon dioxide as complex organic components of living organisms