Why are graphs useful when interpreting data?
they make trends in the data easier to see.
they are easier to create than data tables.
they take the place of pictures in a report.
they can be used to show additional data.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

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