Climate change has been linked to an excess of carbon dioxide in the atmosphere - VCE - SSCE Biology - Question 8 - 2012 - Paper 1
Question 8
Climate change has been linked to an excess of carbon dioxide in the atmosphere. The burning of coal is a major contributor to this excess of carbon dioxide.
Microal... show full transcript
Worked Solution & Example Answer:Climate change has been linked to an excess of carbon dioxide in the atmosphere - VCE - SSCE Biology - Question 8 - 2012 - Paper 1
Step 1
Input X
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Answer
Input X is water or inorganic phosphate, which is essential for the photosynthetic process in Chlorella.
Step 2
Compound Y
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Compound Y is oxygen, a byproduct of photosynthesis that is released into the environment.
Step 3
M
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Process M is the light-dependent reaction, which occurs in the grana of the chloroplast.
Step 4
O
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Process O is glycolysis, which takes place in the cytoplasm or cytosol of the cell.
Step 5
P
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Process P refers to the stages of cellular respiration, which occurs in the mitochondria.
Step 6
Explain how Chlorella farming could prevent 50% of the carbon dioxide emitted by coal-burning power stations from entering the atmosphere.
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Chlorella farming can absorb significant amounts of carbon dioxide during photosynthesis, using it to produce glucose and oxygen. This process not only utilizes carbon dioxide from the atmosphere but also offsets emissions from coal-burning power stations. If these farms are strategically located near such stations, they can effectively capture about 50% of the carbon dioxide emissions, thereby mitigating climate change.
Step 7
What are two conditions, other than carbon dioxide supply, that an engineer or biologist would need to control?
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Suitable temperature: The growth rate and metabolic functions of Chlorella are highly dependent on maintaining an optimal temperature range.
Light: Adequate sunlight or artificial light is crucial for photosynthesis, which powers the growth of Chlorella.
