Which organisms transform nitrogen to a form that is useful to plants?

nitrogen-fixing bacteria is the answer

Explanation:

Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants. 

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the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.