Answer
The five kingdom classification system, championed by Lynn Margulis, revolutionized taxonomy by incorporating evolutionary relationships and cellular structure. It classified organisms into five distinct kingdoms: Monera (prokaryotes), Protista (eukaryotic algae and protozoa), Fungi, Plantae, and Animalia. This system recognized the fundamental differences between prokaryotes and eukaryotes, and highlighted the diversity and complexity of life on Earth.