geographic barrier
11North Barrier — is a narrow rock ridge which descends northward from Campbell Peak to Mount Separation, and then along the northwest flank of Compton Glacier in northern Heard Island. The descriptive name was applied by ANARE (Australian National Antarctic… …
12biogeographic region — Introduction area of animal and plant distribution having similar or shared characteristics throughout. It is a matter of general experience that the plants and animals of the land and inland waters differ to a greater or lesser… …
13Romance languages — Romance Geographic distribution: Originally Southern Europe and parts of Africa; now also Latin America, Canada, parts of Lebanon and much of Western Africa Linguistic classification: Indo European Italic …
14Evolution of dinosaurs — This article gives an outline and examples of dinosaur evolution. For a detailed list of interrelationships see Dinosaur classification. Further information: Evolution of reptiles Evolution of dinosaurs Dinosaurs evolved from the archosaurs 232… …
15vicariance — noun a) The separation of a group of organisms by a geographic barrier, resulting in differentiation of the original group into new varieties or species b) The geological event which produces such a barrier ( …
16Yangtze River — Coordinates: 31°23′37″N 121°58′59″E / 31.39361°N 121.98306°E / 31.39361; 121.98306 …
17Heteropatric speciation — is a special case of sympatric speciation that occurs when different ecotypes or races of the same species geographically coexist but exploit different niches in the same patchy or heterogeneous environment. Thus heteropatric speciation is a… …
18Zagros Mountains — Topographic map of Iran with the Zagros Mountains The Zagros Mountains from space, September 1992 …
19Bridgehead — A bridgehead (also Bridge head ; French tête de pont ) is a military fortification that protects the end of a bridge that is closest to the enemy. The term has been generalized in news coverage and the vernacular to also mean any kind of defended …
20XI Corps (ACW) — The XI Corps (Eleventh Army Corps) was a corps of the Union Army during the American Civil War, best remembered for its humiliating defeats at the battles of Chancellorsville and Gettysburg in 1863.Formation and the Valley CampaignOn June 26,… …
