Evolution of photosynthesis 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. Timeline of Photosynthesis on Earth Several groups of animals have formed symbiotic relationships with photosynthetic algae. These are most common in corals, sponges and sea anemones. It is presumed that this is due to the particularly simple body plans and large surface areas of these animals compared to their volumes. In addition, a few marine mollusks "Elysia viridis" and "Elysia chlorotica" also maintain a
Ghetto Day/What I Need 12-inch single US cassette single Credits adapted from the liner notes of "Storyteller". Recording and management Personnel for "Ghetto Day" Personnel for "What I Need" Ghetto Day/What I Need "Ghetto Day"/"What I Need" is the second single from American singer-songwriter Crystal Waters' second studio album, "Storyteller" (1994). It was produced by The Basement Boys and released in June 1994 by Mercury Records, A&M Records and A&M's division AM PM. Waters and Sean Spencer wrote "Ghetto Day", which is a funk song that contains samples from The 5th Dimension's song "Stoned Soul Picnic" and Flavor Unit's "Flavor Unit Assassination Squad". According