define co2 on basic requirement of photosynthesis
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· Author has 51 answers and 82.3k answer views. Photosynthesis requires light energy which is captured by special pigments, most notably chlorophyll. This energy is used to create energy-rich carbohydrate molecules (sugar and starch) out of carbon dioxide (CO2) and water (H2O
{CO}^{2} is basically required by Plants because plants need Carbon Dioxide to be able to conduct the Calvin Cycle. This is the part of photosynthesis that makes the sugars that plants need to carry out cellular processes.
To keep things short, basically what a plant does is take the carbon dioxide, and does a few chemical reactions with it to turn it into a molecule containing 12 carbon molecule. Part of this 12-carbon molecule breaks off to make sugar, and the remaining part goes back into the cycle so it can react with the next carbon molecule, and the cycle continues.
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