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 Do You Take Me For? to number 20 with 16,553 copies sold. The music video, directed by Declan Whitebloom, premiered on 6 October 2011 and develops on a dark background while Lott is seen dancing and singing. It begins with a car pulling into a building before Lott and various scantily-clad back-up dancers perform their routine while Pusha T is seemingly pleading to Lott. Credits adapted from the liner notes of "Young Foolish Happy". What Do You Take Me For? "What Do You Take Me For?" is a song by English singer Pixie Lott from her second studio album, "Young Foolish Happy" (2011). The song