Scientists have divided the tree of life into three domains: Bacteria, Archaea and Eukarya.
Which of the following is a typical characteristic to distinguish Eukarya from both Bacteria and Archaea and why?
A. circular chromosomes, because they are only found in Bacteria and Archaea
B. nuclear envelope, because they are only found in Bacteria and Archaea
C. exons in the DNA, because they are uncommon in Eukarya
D. cell organelles, because they are present in Eukarya
