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Photosynthesis plays an important role in the carbon cycle - Leaving Cert Agricultural Science - Question b - 2013
Question b
Photosynthesis plays an important role in the carbon cycle. (i) Outlines the role of photosynthesis in the carbon cycle. (ii) Write a balanced equation for photosy... show full transcript
Worked Solution & Example Answer:Photosynthesis plays an important role in the carbon cycle - Leaving Cert Agricultural Science - Question b - 2013
Step 1
Outlines the role of photosynthesis in the carbon cycle.
Answer
Photosynthesis is a vital process in the carbon cycle as it absorbs carbon dioxide (CO₂) from the atmosphere and converts it into organic matter, primarily glucose. This process occurs in the chloroplasts of plant cells, where sunlight energy is used to drive the reaction that combines CO₂ and water (H₂O) to produce glucose and oxygen (O₂). The glucose produced can be used by the plants as food or energy, and is subsequently consumed by other organisms, thus integrating carbon into the food web.
Step 2
Step 3
Name and describe any two other stages in the carbon cycle.
Answer
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Combustion: This process involves the burning of fossil fuels, which releases stored carbon back into the atmosphere as carbon dioxide (CO₂). It contributes to the greenhouse effect and climate change.
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Respiration: This process occurs in animals and plants where organic matter (like carbohydrates) is broken down to release energy. During respiration, organisms convert glucose back into CO₂, which is then released into the atmosphere.