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Revision:GCSE Biology - The Carbon and Nitrogen CyclesTSR Wiki > Study Help > Subjects and Revision > Revision Notes > Biology > GCSE Biology - Breathing
Decomposition and the carbon cycleDecomposition is carried out by bacteria and fungi. When animals and plants die they are decomposed by soil bacteria. This happens most in warm moist conditions where there are decomposers (bacteria and fungi) and there is lots of oxygen and the organic material is cut up into little bits.
The nitrogen cycle
Nitrogen fixing bacteria are bacteria which are in the roots of legumes, and are used in crop rotation because they are very useful for turning nitrogen in the air. decomposers: breaks downs proteinsfrom dead animal and ureas. denitrifying bacteria: they are found on waterloggs and they converts back nitrates into nitrogen gas. nitrifying bacteria: turns ammonuim compounds into nitrates , so that it can be absorbed by plants. Also SeeHere are the other comprehensive GCSE Biology notes by Prometheus:
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