denahlafrance16
denahlafrance16 denahlafrance16
  • 23-03-2020
  • Biology
contestada

How much oxygen is contained in the atmosphere?
OA) 20%
OB) 21%
OC) 22%
OD) 23%

B~ 21%

Respuesta :

cruzdanielarox cruzdanielarox
  • 23-03-2020
0B)21% that’s your answer
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