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).
Species Concepts and the Definition of Species. 1) Biological species concept: Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups (Mayr, 1940).) Isolation species concept: Species are systems of populations: the gene exchange between these systems is limited or prevented by a reproductive isolating mechanism or perhaps by a combination of several such mechanisms.