To my knowledge: Miller And Urey Modle The conditions by Laboratory Experiments
photosynthesis
Yes
Miller and Urey
mostly carbon dioxide with little or no oxygen.
Oxygen Please study this, & don't forget it so you don't have to keep looking up answers .
yes
oxygen
oxygen
nitrogen
no
photosynthsis
photosynthesis
nitrogen
Photosynthesis by plants
Hydrogen and helium
Carbon dioxide
Methane gas