Answer     DID stands for Direct Inward Dial. Also know as DDI, Direct Dial In. It is when a phone on a private telephone switch can be dialled directly from a â¦ ny phone in the world. The last few digits of the number dialled are know as the DID number. For example, a telephone extension number 4400 might be dialable from anywhere as +35318784400. 8 people found this useful.
1. (Biology) biology. a. any of the taxonomic groups into which a genus is divided, the members of which are capable of interbreeding: often containing subspecies, varieties, or races. A species is designated in italics by the genus name followed by the specific name, for example Felis domesticus (the domestic cat).
1 Phylogenetic species concept: a species is a tip on a phylogeny, that is, the smallest set of organisms that share an ancestor and can be distinguished from other such sets. 2  Under this definition, a ring species is a single species that encompasses a lot of phenotypic variation. researchers choice of species concept often reflects his or her research focus. Making that decision requires the scientist to commit to a species concept. For most purposes and for communication with the general public, the biological species concept is used.