ZacharyKhammixay
ZacharyKhammixay ZacharyKhammixay
  • 02-06-2015
  • Physics
contestada

What gas was present in earth's earliest atmosphere and used by cyanobacteria during photosynthesis?

A.
oxygen

B.
carbon dioxide

C.
nitrogen

D.
methane

Respuesta :

car28 car28
  • 02-06-2015
These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. In fact, all the plants on Earth incorporate symbiotic cyanobacteria (aka chloroplasts) to do their photosynthesis for them down to this day. so i believe  it is carbon dioxide.
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