Explain the Three Stages of Photosynthesis
Although many people associate photosynthesis with plants simply converting light into nutrients, the process involves three distinct phases. These phases include receiving light, converting it into nutrients and releasing waste products back into the atmosphere. Does this Spark an idea?
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Light Absorption
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In the first phase of photosynthesis, a plant absorbs ambient light. The amount of light the plant can absorb depends on its pigmentation; darker colored plants can absorb more light.
Energy Conversion
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In the second phase of photosynthesis, a plant converts absorbed light into chemical energy. According to David Clark, professor of Microbiology at Southern Illinois University, plants facilitate a chemical reaction involving light, soil nutrients and water during this phase that includes splitting water into hydrogen and oxygen atoms.
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CO2 Reduction
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In the third phase of photosynthesis, a plant takes carbon dioxide, or CO2, from the atmosphere to aid in the chemical reaction. Light is not necessary for this process, known as CO2 reduction, and this phase leads to the production of carbohydrates. The plant releases a byproduct, oxygen, back into the atmosphere as waste.
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References
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