The document discusses the five kingdoms used to classify living things: Monera, Protista, Fungi, Plantae, and Animalia. Each kingdom is described in one to two sentences - Monera contains prokaryotic organisms like bacteria, Protista contains eukaryotic organisms that can be single or multi-celled like algae and amoebas, Fungi are heterotrophic decomposers like molds and mushrooms, Plantae are multicellular and autotrophic with tissues and sometimes organs like trees and ferns, and Animalia are multicellular and heterotrophic with tissues and often organs and systems like jellyfish and squirrels.