Which are major components of ribosomes?

(a) single strands of sugar

(b) dna and proteins

(c) rna and proteins

(d) double strands of nucleic acids

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.

cell division is not regulated in tumor cells.