Complete each sentence about decomposition - OCR Gateway - GCSE Biology - Question 22 - 2023 - Paper 2
Question 22
Complete each sentence about decomposition.
Decomposition is caused by microorganisms such as **bacteria**.
The microorganisms use the process of **respiration** t... show full transcript
Worked Solution & Example Answer:Complete each sentence about decomposition - OCR Gateway - GCSE Biology - Question 22 - 2023 - Paper 2
Step 1
Complete each sentence about decomposition.
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Answer
Decomposition is caused by microorganisms such as bacteria.
The microorganisms use the process of respiration to release the energy in dead organisms.
Decomposition also allows minerals to be made available in the soil for plants to use.
Step 2
Some students investigate plant decomposition.
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Answer
The graph shows that the ratio of carbon to nitrogen affects the temperature of the compost heap over time. The highest temperature is observed in the 30:1 ratio, indicating optimal decomposition activity at this ratio. Meanwhile, the 40:1 ratio shows a moderate temperature increase, while the 60:1 ratio remains the lowest, suggesting less efficient decomposition.
