The origin of life and the origin of enzymes.
D000596:Amino Acids / Q000138:chemical synthesis; D005075:Biological Evolution; D004798:Enzymes; D006838:Hydrocarbons; D008697:Methane; D010100:Oxygen; D014466:Ultraviolet Rays
D000596:Amino Acids; D004798:Enzymes; D006838:Hydrocarbons; D008697:Methane; D010100:Oxygen