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What are the four kingdoms and how are they classified?
The four kingdoms are Protista, Plantae, Fungi, Animalia. Member of the Protista, called protists, are single celled or multicellular organisms such as algae and slime molds. Plantae consists of multicellular organisms that have cell walls, mostly made of cellulose. Fungi get energy by absorbing materials. Animalia contains multicellular organisms that lack cell walls.