The document provides an overview of how living things are classified, beginning with the largest groupings (kingdoms) and becoming more specific down to genus and species levels. It discusses key characteristics used to classify organisms, such as cell structure, reproduction methods, feeding behaviors, etc. Example organisms are provided for different kingdoms including Monera, Protista, Fungi, Plantae and Animalia. Within Animalia, invertebrate and vertebrate phyla are described along with characteristics used to distinguish them.