domainkingdomphylum
Domainkingdomphylum refers to three hierarchical levels used in biological classification: domain, kingdom, and phylum. In modern taxonomy, the domain is the highest rank, followed by kingdom, then phylum, and continuing through class, order, family, genus, and species. The three-domain system, proposed by Carl Woese and colleagues, divides life into Bacteria, Archaea, and Eukarya. This framework reflects major evolutionary lineages based largely on genetic differences, especially ribosomal RNA sequences.
Within each domain, organisms are organized into kingdoms (though the number and names of kingdoms vary by
Phylum represents a mid-level category that captures major body plans and organizational traits within a kingdom.