yengracojorisboo yengracojorisboo
  • 13-12-2015
  • Biology
contestada

How often does oxygen cycle through the atmosphere?
a. about every 1000 years
b. about every 1500 years
c. about every 2000 years
d. about every 2500 years

Respuesta :

Sophiag1315 Sophiag1315
  • 13-12-2015
about every 2000 years.

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nrlindly
nrlindly nrlindly
  • 06-02-2019

B. about every 2000 years


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