A) chromosome b) dna nucleotide c) codon d) gene place the components in order, from smallest to largest. a) a-b-d-c b) b-c-d-a c) c-d-b-a d) d-c-b-a

The correct answer is- B) B-C-D-A that is DNA nucleotide- Codon-  Gene- Chromosome.

DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotide ( which contains deoxyribose sugar, phosphate, and nitrogenous base).  

A sequence of three nucleotide is called codon ( which codes for a particular amino acid).

Different codons are present in a gene, which is a segment of DNA coding for a particular protein.

Finally, genes are present on chromosome ( thread like structure composed of DNA).

Thus, option B) correctly depicts the given components in order, from smallest to largest.

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.

but there is no

i guess you forgot putting it.