Proteins are different based on number and type of contained in their polypeptide chain(s). a) fatty acids b) amino acids c) nucleic acids d) monosaccharides

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

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.