• Asignatura: Biología
  • Autor: madelosan2009
  • hace 7 años

Hi, I wanted to know everyone, because there is oxygen in the earth


mineraas: put me a crown please

Respuestas

Respuesta dada por: mineraas
1

Respuesta:

bc without oxygen we can't live

Explicación:


mineraas: you really speak english?
madelosan2009: i dont now that
madelosan2009: why you put that
madelosan2009: in spanish
madelosan2009: i dont under stand
mineraas: For this case, there is only one accepted general theory - although still under discussion - among scientists, which states that molecular oxygen on Earth originated from the photosynthesis of ancestral cyanobacteria.
madelosan2009: thanks
madelosan2009: bye
mineraas: no
mineraas: put me best answer
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