62 résultats pour "polar"
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Canada.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
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Canada - country.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
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Canada - Canadian History.
Six general landform regions are distinguishable in Canada: the Appalachian Region, the Great Lakes and St. Lawrence Lowlands, the Canadian Shield, the Great Plains,the Canadian Cordillera, and the Canadian Arctic Archipelago. B1 Appalachian Region and Great Lakes and St. Lawrence Lowlands Eastern Canada consists of the Appalachian Region and the Great Lakes and St. Lawrence Lowlands. The Appalachian Region embraces Newfoundland Island, NovaScotia, New Brunswick, Prince Edward Island, and the G...
- North Star - astronomy.
- Coordinate System (mathematics).
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Bear - biology.
programs sponsored by zoos or other breeding centers have attempted to breed giant pandas in captivity, although most of these programs have proved unsuccessful.Among the difficulties faced by captive breeders has been the problem of encouraging a female giant panda to mate with a selected male during the two to three daysof the year when she is most fertile, a period known as estrus. B Spectacled Bear Creamy-white rings surrounding the eyes give the spectacled bear its name. Its shaggy coat of...
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Antártida - geografía.
líquenes, musgos y algas. Hay ricos lechos de tal vegetación en partes de la península Antártica, y se han descubierto líquenes en crecimiento en montañas aisladas a475 km del polo sur. Hay tres especies de plantas con flores en la península Antártica. 2.6 Fauna Ningún animal vertebrado terrestre habita la Antártida. Se pueden encontrar invertebrados, especialmente ácaros y garrapatas, que pueden tolerar las bajas temperaturas,pero todavía se consideran poco comunes. Los océanos circundantes, s...
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Article de presse: Dix ans de guerre froide franco-britannique
nucléaires pour transporter les Polaris, ni têtes thermonucléaires pour les armer " (alors que la Grande-Bretagne en dispose grâceà ses " liens spéciaux " ) et que, lorsqu'elle en fabriquera, elle fabriquera aussi ses fusées elle-même. L'année suivante, une nouvelle crise secoue la Communauté. Invoquant un manquement grave des autres Etats membres à leursengagements agricoles, de Gaulle laisse " la chaise " de la France vide jusqu'à ce qu'ils admettent le droit de recourir au vetoquand " des...
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Reproducción vegetal - ciencias de la naturaleza.
Ciclo biológico de una gimnosperma (conífera)© Microsoft Corporation. Reservados todos los derechos. Los sacos polínicos contienen las células madres del polen (diploides), que por meiosis forman los granos de polen (haploides). El óvulo está cubierto por tegumentos ycontiene la célula madre del saco embrionario, que sufre una meiosis y forma cuatro células, de las que sólo subsiste una, la cual da lugar al saco embrionario, que es unacélula con ocho núcleos. Tres de estos núcleos se sitúan en u...
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Dinosaur - biology.
The behavior of dinosaurs was governed by their metabolism and by their central nervous system. The dinosaurs’ metabolism—the internal activities that supply thebody’s energy needs—affected their activity level. It is unclear whether dinosaurs were purely endothermic (warm-blooded), like modern mammals, or ectothermic (cold-blooded), like modern reptiles. Endotherms regulate their body temperature internally by means of their metabolism, rather than by using the temperature oftheir surroundin...
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Manitoba - Geography.
E Plant Life Forests cover 66 percent of Manitoba. The main forest area is divided into the boreal forest and the mixed-wood forest. The boreal, or northern, forest containsconiferous (cone-bearing) trees, especially white and black spruce, balsam fir, and jack pine. South of the boreal forest is the mixed-wood forest, which contains conifers as well as such deciduous trees as white birch, aspen, poplar, and Manitoba maple. Prairie land is found in the southwest, where the natural vegetation i...
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Manitoba - Canadian History.
E Plant Life Forests cover 66 percent of Manitoba. The main forest area is divided into the boreal forest and the mixed-wood forest. The boreal, or northern, forest containsconiferous (cone-bearing) trees, especially white and black spruce, balsam fir, and jack pine. South of the boreal forest is the mixed-wood forest, which contains conifers as well as such deciduous trees as white birch, aspen, poplar, and Manitoba maple. Prairie land is found in the southwest, where the natural vegetation i...