Describe the basis for R H whittaker's five kingdom system?

R.H. Whittaker's five kingdom system was based on differences in cell structure, mode of nutrition, and reproduction in organisms. The five kingdoms were Monera (prokaryotes), Protista (unicellular eukaryotes), Fungi (non-photosynthetic eukaryotes), Plantae (photosynthetic eukaryotes), and Animalia (multicellular eukaryotes). This system aimed to reflect the diversity of life forms and their evolutionary relationships more accurately than previous classification systems.