Linked from
The 14 pages that link to Oxygenic photosynthesis, each with the reason it gives.
OxygenRelated: This metabolism is the principal biological source of free O₂ on Earth.
Atmosphere of EarthRelated: It produced the oxygen that eventually accumulated in the atmosphere.
PrecambrianRelated: Its evolution supplied the oxygen that eventually accumulated in the atmosphere.
Microbial matRelated: Surface phototrophs can oxygenate upper layers during daylight.
NeoarcheanRelated: Its emergence may explain oxygen signals in Neoarchean rocks.