One difference between dna and rna is that
a) adenine is found only in rna.
b) guanine is found only in dna.
c) cytosine is found only in rna.
d) thymine is found only in dna.

lipid

explanation:

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides