This phylogenetic tree of life depicts the evolution of relationships between organisms. Phylogeny is the scientific term for the evolutionary history and relationships of an organism or group of organisms. Phylogeny describes an organism's associations, such as which organisms it is thought to have evolved from, which species it is most closely related to, and so on. Phylogenetic relationships reveal common ancestors but not necessarily how organisms are similar or different. As shown in this phylogenetic tree of life diagram, over one million other insect species have already been described. Go ahead and start using EdrawMax to create phylogenetic trees for your class.