Nitrogen-fixing bacteria such as Rhizobium live in the root nodules of
Ayam.
Bcassava.
Cmaize.
Dcowpea (beans).CORRECT
JUPEBBiologyEcology and Conservation
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Rhizobium forms a mutualistic association with legumes such as cowpea, groundnut and soya bean, converting atmospheric nitrogen into ammonium compounds the plant can use in exchange for sugars. This is why legumes are used in crop rotation to restore soil fertility.
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