Answer:
a. to account for two major and distinct prokaryotic groups in addition to eukaryotes.
Explanation:
The system of Five Kingdoms was accepted because all the living things are classified in this model. Based on the fundamental characteristics, prokaryotes are included in one kingdom and the four kingdoms of eukaryotic organisms (protists, fungi, plants and animals). In the late 1970s, Carl Woese and his colleagues found that there were two separate groups of prokaryotes based on DNA sequences of different prokaryotes. Due to the vast difference in genetic structure makeup, Carl Woese proposed that all the organisms be divided into three domains: Eukaryota, Eubacteria, and Archaebacteria.
