Which made possible an increase in chemical energy for cell activities in organisms living on the earth?

A.
a change from a primitive atmosphere, which was about 70% nitrogen, to an atmosphere that was 70% oxygen

B.
the development of plants that could add more water vapor to the atmosphere, increasing the earth's water supply

C.
a change from a reducing atmosphere where there was no free oxygen to an oxidizing environment where free oxygen was abundant

D.
the discovery of ATP and ADP by sci

Question

Which made possible an increase in chemical energy for cell activities in organisms living on the earth?  
 
  


  

  A. 
  a change from a primitive atmosphere, which was about 70% nitrogen, to an atmosphere that was 70% oxygen   
    


  

  B. 
  the development of plants that could add more water vapor to the atmosphere, increasing the earth's water supply   
    


  

  C. 
  a change from a reducing atmosphere where there was no free oxygen to an oxidizing environment where free oxygen was abundant   
    


  

  D. 
  the discovery of ATP and ADP by sci

anonymous · Answer

Well I would say either A or D because aerobic makes more ATP than anaerobic. And the mitochondria uses aerobic since it can make up to about 32 ATP (if I remember correctly). Not exactly sure if the discovery of ATP or ADP by scientists would truly do anything since it would happen regardless.