How Everolimus (Afinitor) Works. Everolimus (Afinitor, made by Novartis Pharmaceuticals) is an oral compound cancer treatment, and classified as a signal transduction inhibitor â specifically, an inhibitor of the mTOR protein that controls other proteins known to trigger tumor growth.
Description. The tundra is the coldest of the biomes. It also receives low amounts of precipitation, making the tundra similar to a desert. Tundra is found in the regions just below the ice caps of the Arctic, extending across North America, to Europe, and Siberia in Asia. Much of Alaska and about half of Canada are in the tundra biome. Tundra is also found at the tops of very high mountains elsewhere in the world.
Tundra, the ice desert, frozen prairie, the cold plains of the Far North get their name from the Finnish word tunturia, which means treeless land. The tundra biome is the coldest of all terrestrial eco-systems, and also the most chaotic. Still, the tundra is host to a surprising number of plants and animals, and represents a fascinating testament to nature's adaptability, and cruel beauty. The arctic tundra occupies earth's Northern hemisphere, circling the North Pole all the way down to the evergreen forests of the boreal biomes. The arctic tundra sees little rainfall, like the cold deserts of russia. The soil of the arctic tundra is poor in nutrients, which accounts for the low amount of vegetation.