Evolution of photosynthesis C photosynthesis is the oldest and most common form. C3 is a plant that uses the calvin cycle for the initial steps that incorporate CO2 into organic material. C4 is a plant that prefaces the calvin cycle with reactions that incorporate CO2 into four-carbon compounds. CAM is a plant that uses crassulacean acid metabolism, an adaptation for photosynthesis in arid conditions. C4 and CAM Plants have special adaptations that save water. The biochemical capacity to use water as the source for electrons in photosynthesis evolved in a common ancestor of extant cyanobacteria. The geological record indicates that this transforming event
Get What You Need Get What You Need Get What You Need is a 2003 studio album by an Irish power pop/punk rock band The Undertones. It is the band's first collection of new studio material since their reformation with lead singer Paul McLoone, who replaced the previous singer Feargal Sharkey which occurred in November 1999. Allmusic stated in their review that "It's almost unthinkable, really, that Derry's fabled good-time teen punks of yesteryear would record and continue... let alone that their output would be anything less than embarrassing." The website also stated that "you have everything you need for a complete escape to