What term describes a group of organisms with similar characteristics but not necessarily of the same species?

The term that describes a group of organisms with similar characteristics but not necessarily of the same species is "gen." This term refers to an informal grouping of organisms that may share certain traits or characteristics, but lack the strict taxonomic criteria of classification such as family, genus, or species. In this context, "gen" can encompass a broader array of organisms, allowing for variability within the group that would not be possible under more rigid classifications.

In scientific classification, a family is a higher taxonomic rank that groups together multiple genera (plural of genus), while a genus categorizes species that are closely related and share common characteristics. A species is the most specific classification and includes individuals that can potentially interbreed and produce fertile offspring. Therefore, "gen" serves as a broader term that allows for the grouping of various kinds of organisms, highlighting common features without the constraints of precise species classification.