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CIE · IGCSE · Biology

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Topic: Cycles within ecosystems. Pick an answer — get the mark scheme instantly.

Question · Difficulty 2/3

A student investigated the effect of temperature on decomposition by placing identical masses of leaf litter in mesh bags and burying them in soil at three different temperatures (5°C, 15°C, and 25°C). After 4 weeks, the bags were removed and the remaining mass recorded. The results showed that mass loss was greatest at 25°C. Which of the following best explains this result?

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