Most of the earth is cover bybiome
Which biome is it??

Marine. largest biome - covers 75% of Earth's surface; most stable biome; provides majority of Earth's food and oxygen.

Explanation:

Hope this helps!

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.