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
Girls Can't Do What the Guys Do 1972 studio album "See All Her Faces". Yellowman covered it for "King Yellowman" (1984). "Girls Can't Do What the Guys Do" is sampled in "Upgrade U" by Beyoncé and Jay-Z, from Beyoncé's album "B'Day" (2006) and in "No Homo Outro", a track from "Turtleneck & Chain" (2011) by The Lonely Island. Girls Can't Do What the Guys Do "Girls Can't Do What the Guys Do" is a single by American recording artist Betty Wright from her debut studio album "My First Time Around" (1968). It was written by Willie Clarke and Clarence Reid, and released in 1968 by Alston Records.