Variation and classification - The five kingdoms The first big division of living things in the classification system is to put them into one of five kingdoms. These are based on what an organism's cells are like. The table shows the names of the kingdoms and examples of the sort of organisms they contain. Kingdom Protoctists Prokaryotes Fungi Examples Amoeba Paramecium Bacteria Blue-green algae Moulds Mushrooms Yeast Kingdom Examples Plants All green plants, including: Algae, ferns and mosses (plants that do not produce seeds) Conifers and flowering plants (plants that do produce seeds) Animals All multicellular animals, including: jellyfish, worms, arthropods, molluscs, echinoderms, fish, amphibia, reptiles, birds and mammals