What are 2 roles that bacteria play in the nitrogen cycle?

Bacteria break down the proteins contained in the bodies of plants and animals into ammonia through the process of decay. The next step in the nitrogen cycle is nitrification, which is carried out by two nitrifying bacteria: nitrosomonas and nitrobacter.

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They use the si unit, or metric system its all the same thing

Homologous chromosomes with heterozygous alleles d) heterozygous chromosomes with homozygous alleles