The continent that has a vast tundra biome is North America (particularly in Alaska and northern Canada) and Eurasia (notably in northern Russia and parts of Scandinavia). The tundra is characterized by its cold climate, short growing seasons, and permafrost layer, which affects soil composition. This biome supports unique vegetation, such as mosses and lichens, and diverse wildlife adapted to the harsh conditions. Tundra ecosystems are vital for global climate regulation and serve as important habitats for migratory species, making them a focus of environmental conservation efforts.