Photosynthesis More recent studies, reported in March 2018, also suggest that photosynthesis may have begun about 3.4 billion years ago. The main source of oxygen in the Earth's atmosphere derives from oxygenic photosynthesis, and its first appearance is sometimes referred to as the oxygen catastrophe. Geological evidence suggests that oxygenic photosynthesis, such as that in cyanobacteria, became important during the Paleoproterozoic era around 2 billion years ago. Modern photosynthesis in plants and most photosynthetic prokaryotes is oxygenic. Oxygenic photosynthesis uses water as an electron donor, which is oxidized to molecular oxygen () in the photosynthetic reaction center. Several groups of animals
Do What You Do (Jermaine Jackson song) the past: "Why don't you do what you do / when you did what you did to me?" Its B-side is "Tell Me I'm Not Dreamin' (Too Good to Be True)", a duet with Michael Jackson. The song was sampled by Lil Wayne for "How Could Something" and by Chamillionaire for "Void In My Life". The music video was an imitation of "The Godfather" and supermodel Iman played Jackson's love interest who eventually betrays him by trying to shoot him. After his henchmen take her away, it is not revealed what happened to her. Do What You Do (Jermaine Jackson