Nitrogen fixation - Process in which nitrogen gas is converted into nitrate, Nitrate ions - Soluble compound produced by nitrogen fixing bacteria that can be taken up by plants, Amino acids - Nitrogen containing compound needed to synthesise proteins, Nitrogen fixing bacteria - Bacteria that live in root nodules of plants such as clover, beans and peanuts - they provide nitrate ions to the plant, Urine - Waste product containing the nitrogen compound urea, Ammonium ions - Nitrogen containing ions produced by decay of amino acids and urea, Denitrifying bacteria - Bacteria that convert nitrate to nitrogen gas in the absence of oxygen, DNA - Nucleic acid that has atoms of nitrogen in its structure, Feeding - Process carried out by animals to obtain the nitrogen containing compounds they need, Deamination - The breakdown of amino acids,

IGCSE Nitrogen cycle

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