Which of the following is true? A.)Only eukaryotes have DNA, while prokaryotes have RNA
B.)All living organisms (including eukaryotes and
prokaryotes) have both DNA and RNA
C.)All living organisms (including eukaryotes and
prokaryotes) have DNA but not RNA
Only prokaryotes have DNA, while eukaryotes have RNA

Part a - which gene to compare? in this exercise, you will use the cytochrome c oxidase i (coi) gene to investigate relationships among salmon species. (this gene encodes a protein that functions in the mitochondrial electron transport chain.) you will compare the coi gene sequences from your salmon test samples to the standard sequences for each salmon species. in order for the coi gene to be useful for distinguishing among the different salmon species, which three statements must be true?