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
What Cha' Gonna Do for Me highest charting album until her 80's-era breakthrough "I Feel For You". Its popularity among jazz audiences was likely due to the inclusion of the Dizzy Gillespie composition "Night In Tunisia" with a guest appearance by Gillespie himself as well as what today would be called a 'sample' of Charlie Parker's legendary four bar alto break from his 1946 recording of the title. Khan's vocal interpretation also features lyrics written by the singer herself. This album was nominated for Best R&B Vocal Performance, Female in 1981. Two tracks from the "What Cha Gonna Do For Me" sessions were only released as