Kingdom Protista is probably comprised of groups of organisms that may not be closely related, and are undergoing continual assessment
<h3>What are the six - kingdoms of life?</h3>
The discovery of archaebacteria complicates the five-kingdom classification system for living organisms, which includes the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae, and Animalia. The prokaryotic Monera are divided into three groups: regular bacteria or eubacteria, cyanobacteria (also known as blue-green algae), and archaebacteria. Archaebacterial cell membrane lipids differ significantly from those of prokaryotic and eukaryotic cells, as do their cell wall composition and ribosomal RNA subunit sequence. Furthermore, recent research has revealed that archaebacterial RNA polymerases resemble eukaryotic enzymes rather than eubacterial RNA polymerase.
Archaebacteria have introns in some genes, an advanced eukaryotic feature previously unknown in prokaryotes.
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