On a molecular level, all organisms
a. show no similarities.
b. have the same bases in dna and rna, the same amino acids in proteins, and use the same genetic code.
c. have the same bases in dna and rna, but different amino acids in proteins.
d. use different means of storing genetic information.
e. have the same bases in dna and rna, the same amino acids in proteins, but use different genetic codes.