A group of organisms is a collection of living things that share similar characteristics. The term can refer to a variety of different groupings, such as GENERA, clones, and clusters. GENERA are a taxonomic rank used in the classification of organisms, and is typically composed of closely related species. A CLONE is an organism that is genetically identical to its parent, and is usually created through asexual reproduction. Finally, a CLUSTER is a group of organisms that are geographically close together, and may or may not be related.