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How is the system of the five realms of biology divided?
Animal kingdom, plant kingdom, protozoa kingdom, fungi kingdom, fungi kingdom.

1.kingdom monera: Characteristics of bacteria, rickettsia, mycoplasma and cyanobacteria: DNA is circular and located in cytoplasm, and there are no formed nuclei and membrane organelles in cells, so it is a prokaryote. Cells undergo amitosis. 2. Protozoa: unicellular protozoa and algae. Characteristics: Single-celled organisms with nuclear membrane in the nucleus and organelles with membrane structure in the cells. Cells undergo mitosis. 3. Fungal kingdom: Fungal characteristics: cells have cell walls and no chloroplasts, so they cannot carry out photosynthesis. There is no distinction between roots, stems and leaves. Living in saprophytic and parasitic life, the way of nutrition is decomposition and absorption, and it is a reducing agent in the food chain. 4. Plant kingdom: Features: Chloroplast, which can carry out photosynthesis. Nutrition: autotrophic, as a food producer. 5. Animal kingdom: nutrition mode: heterotrophy. For consumers.