Which of the following is true about the genetic material of eukaryotes and prokaryotes? a. eukaryotes and prokaryotes both have dna, but it is only enclosed in a membrane in prokaryotic cells. b. only prokaryotic cells contain dna because eukaryotes use rna as their genetic material instead. c. only eukaryotic cells contain dna because prokaryotes use rna as their genetic material instead. d. eukaryotes and prokaryotes both have dna, but it is only enclosed in a membrane in eukaryotic cells.