nolanbarrows5724 nolanbarrows5724
  • 24-08-2018
  • Chemistry
contestada

How did oxygen come up to make 21% of the earth's present atmosphere?

Respuesta :

iiamkyia
iiamkyia iiamkyia
  • 24-08-2018
tiny organisms known as cyanobacteria, or blue-green algae.
Answer Link

Otras preguntas

Which of the following statements best describes how popular sovereignty applies to federalism? The people elect local government representatives, who in turn c
How does the newspaper help people to share ideas
Use properties to find the sum or product 34+0+18+26
find the equation of the line with the given properties slope 1/2,y-intercept (0,5) slope 3 passing through the point (2,2) passing through the points (5,2) an
Why woulf spain not trust the united states
Solve: ln(x – 3) = ln(7x – 23) –  ln(x + 1)
In the South American Andes, the altiplano between the Cordillera Oriental and the western Cordillera Occidental is widest in A. Bolivia. B. Ecuador. C. Peru
Find the product of 3 times 3/10
what is the depth of oceanic crust
thoughtful acts can benefit others