tbreannellis tbreannellis

09-08-2017
Biology

contestada

what created oxygen in the early atmosphere
Photosynthetic bacteria
Asteroids hitting the earth
plankton
Volcanic eruptions
forests

Respuesta :

Аноним Аноним

09-08-2017

Oxygen was created by the first signs of photosynthesis, done by plants and algae. =)

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