The division of the living world into three domains
A) is based on the number of cells in organisms of each group.
B) is based mostly on the major morphological differences between archaea and bacteria.
C) reflects the great importance of eukaryotes.
D) was proposed after the invention of the first microscope.
E) is based on phylogenetic relationships determined from nucleotide sequences of rRNA and other genes.

Question

Quizplus · Accepted Answer

The division of the living world into three domains is based on phylogenetic relationships determined from nucleotide sequences of rRNA and other genes, rather than morphological differences or cell number. The three domains are Archaea, Bacteria, and Eukarya, with Archaea and Bacteria consisting of prokaryotic organisms and Eukarya consisting of eukaryotic organisms.

The Division of the Living World into Three Domains