Bacteria
Nitrogen fixing bacteria are those that convert atmospheric nitrogen to different nitrogenous ions and add them to the soil. These bacteria may either be free living in the soil, or they may develop a mutualistic relationship with some organisms, such as the nitrogen fixing bacteria that live in the root nodules of leguminous plants. An example of a genus of nitrogen fixing bacteria is the genus Azotobacter.
When you have a cold antibiotics wont do antibiotics are used to treat infections caused by bacteria antibiotics canNOT treat infections caused by viruses such as a cold even flu
It’s is b because when your put that one together your get the and and you put all the together it get the other one
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