WebOpuntia ficus-indica, the Indian fig opuntia, fig opuntia, or prickly pear, is a species of cactus that has long been a domesticated crop plant grown in agricultural economies throughout arid and semiarid parts of the world. O. ficus-indica is the most widespread and most commercially important cactus. It is grown primarily as a fruit crop, and also for the …

WebChaetodon is a tropical fish genus in the family Chaetodontidae.Like their relatives, they are known as "butterflyfish". This genus is by far the largest among the Chaetodontidae, with about 90 living species included here, though most might warrant recognition as distinct genera.

WebA desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation.About one-third of the land surface of the Earth is arid or semi-arid.This includes much of the polar regions, where little …

WebThe Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa.. The realm consists of several bioregions: the Euro-Siberian region; the Mediterranean Basin; the Sahara and Arabian Deserts; and Western, Central and East Asia.The Palaearctic realm …

WebThe South China Sea Islands consist of over 250 islands, atolls, cays, shoals, reefs and seamounts in the South China Sea.The islands are mostly low and small, and have few inhabitants. The islands and surrounding seas are subject to overlapping territorial claims by the countries bordering the South China Sea.. The South China Sea Islands constitute …

WebBiomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain. This increase can occur as a result of: Persistence – where the substance cannot be broken down by environmental processes; …

WebEuropa es el segundo continente más pequeño del mundo, solo por detrás de Oceanía. [cita requerida] Tiene una superficie de 10 359 358 km², [1] lo que representa el 6,8% de las tierras emergidas.A finales de 2016 estaba compuesta por cincuenta países, incluyendo Rusia y Turquía, aunque la mayor parte de sus territorios sean asiáticos.Su distancia …

WebSubfields include: Social geography, Animal geographies, Language geography, Sexuality and space, Children's geographies, and Religion and geography. Development. Development geography is the study of the Earth's geography with reference to the standard of living and the quality of life of its human inhabitants, study of the location, distribution …

WebMexico's Gulf Coastal Plain lies to the east of the range, between the mountains and the Gulf of Mexico coast. The Mexican Plateau, which averages 1,100 metres (3,600 ft) in elevation, lies between the Sierra Madre Oriental and the Sierra Madre Occidental further west.. The climate of the Sierra Madre Oriental is drier than the rainforest areas further …

WebTaxonomy. The genus Buphagus was introduced in 1760 by the French zoologist Mathurin Jacques Brisson with the yellow-billed oxpecker as the type species. The name combines the Ancient Greek words bous "ox" and -phagos "eating".. According to the more recent studies of Muscicapoidea phylogeny, the oxpeckers are an ancient line related to …