title: Chemical evolution.
mesh_terms: D001669:Biochemical Phenomena; D001671:Biochemistry; D005075:Biological Evolution; D002384:Catalysis; D008967:Molecular Biology; D009696:Nucleic Acids; D000069497:Origin of Life; D011506:Proteins; D013548:Sweden
chemical_list: D009696:Nucleic Acids; D011506:Proteins