Explain what an adaptation is, and provide 3 examples.

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.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex