LIFE SCIENCE

Detailed explanation-1: -Tundra biome is located in the far north and is characterized by persistent soil ice (permafrost) throughout the growing season which in turn does not allow growth of any vegetation. Mosses, lichens, grasses and grasslike sedges are the dominant vegetation.

Detailed explanation-2: -Trees cannot survive in the tundra due to a thick layer of polar ice called permafrost. Permafrost is about a foot beneath the surface of the ground. The water in the ground never thaws, so roots cannot reach into it. There are two types of tundra: arctic tundra and alpine tundra.

Detailed explanation-3: -The soil beneath the taiga often contains permafrost-a layer of permanently frozen soil. In other areas, a layer of bedrock lies just beneath the soil. Both permafrost and rock prevent water from draining from the top layers of soil. This creates shallow bogs known as muskegs.