Six kingdom classification was proposed by Carl Woese. It comprises three domains - Archaebacteria, Bacteria, and Eukarya.
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These domains are further divided into 6 kingdoms - Archaebacteria, Bacteria, Monera, Protista, Fungi, Plantae, and Animalia.
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The two kingdoms that consist of prokaryotic organisms are archaebacteria and bacteria.
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Prokaryotes are organisms without a well-defined nucleus or cell organelles. All the other kingdoms consist of eukaryotic organisms.
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