Which of the following lists the six traditional kingdoms of life?

• A. Archaea, Eubacteria, Protista, Fungi, Plantae, Animalia
• B. Archaea, Eubacteria, Protista, Fungi, Plantae, Monera
• C. Bacteria, Archaea, Protista, Fungi, Plantae, Animalia
• D. Archaea, Eubacteria, Protista, Fungi, Monera, Animalia

Answer: (A)

Grouping life into kingdoms helps us categorize organisms by cellular structure and basic biology. The six traditional kingdoms are Archaea, Eubacteria, Protista, Fungi, Plantae, and Animalia. This set separates Archaea and Eubacteria because they are both prokaryotes but differ fundamentally in their genetics and biochemistry, so they are treated as distinct kingdoms. The remaining four—Protista, Fungi, Plantae, and Animalia—are eukaryotes, with Protista serving as a catch‑all group for diverse, mostly unicellular organisms that don’t fit neatly into the other kingdoms, while Fungi, Plantae, and Animalia cover the major multicellular eukaryotic lineages with distinct body plans and life cycles.

Other options mix these groups differently or use older terms like Monera to lump prokaryotes together, which doesn’t align with the traditional six-kingdom framework. That makes the set with Archaea and Eubacteria as separate kingdoms the best match for the traditional model.