Joined: May 09, 2007 Posts: 178 Location: Sri Lanka
Posted: Fri Nov 13, 2009 5:39 pm Post subject: Photosynthesis
1.Photosynthesis is a process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight.
2. Photosynthesis occurs in plants, algae, and many species of Bacteria, but not in Archaea. Photosynthetic organisms are called photoautotrophs, since it allows them to create their own food. In plants, algae and cyanobacteria photosynthesis uses carbon dioxide and water, releasing oxygen as a waste product.
3. Photosynthesis is vital for life on Earth. As well as maintaining the normal level of oxygen in the atmosphere, nearly all life either depends on it directly as a source of energy, or indirectly as the ultimate source of the energy in their food (the exceptions are chemoautotrophs that live in rocks or around deep sea hydrothermal vents).
4. The amount of energy trapped by photosynthesis is immense, approximately 100 terawatts which is about six times larger than the power consumption of human civilization. As well as energy, photosynthesis is also the source of the carbon in all the organic compounds within organisms' bodies. In all, photosynthetic organisms convert around 100,000,000,000 tonnes of carbon into biomass per year.
5. A brief movie detailing the process of Photosynthesis can see below post.
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