In biological taxonomy, what is the classification that ranks above the kingdom?

In biological taxonomy, the classification that ranks above the kingdom is the domain. The domain is the highest taxonomic rank and is used to categorize life forms based on fundamental traits, such as cellular organization and genetic similarities. There are three recognized domains: Bacteria, Archaea, and Eukarya, each encompassing various kingdoms. This hierarchical structure reflects the evolutionary relationships among different groups of organisms, making the domain a crucial level in understanding the broadest categories of life.

Phylum, class, and order are ranks within the hierarchy that come below the kingdom and represent more specific classifications of organisms based on shared characteristics.