ECOLOGY
BIOMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Because of the permanently frozen ground, cold temperatures & short growing season
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Because it is too hot for part of the year
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Because it gets far too much precipitation
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none of these
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Detailed explanation-1: -Due to the cold, the upper soil surface of the region is frozen into a rock-like state all through the year. This is called ‘permafrost’. As there is little soil, only some small plants can grow. The underground soil being hard, it is difficult for trees to grow.
Detailed explanation-2: -A. TUNDRA: treeless low (less than 1 m) vegetation with short perennials, water frozen. Typical plants include sedges, lichens, mosses, grasses, and dwarf woody plants. Typical animals include snowy owls, musk ox, reindeer, polar bears, and migrant birds.
Detailed explanation-3: -Under a thin soil layer exists permanently frozen ground, or permafrost. The existence of contiguous permafrost is thought to be one of the main reasons why there are no trees in the tundra, because, being permenantly frozen, permafrost has a tendency to hamper root development.
Detailed explanation-4: -The soil there is frozen from 25 to 90 cm (10 to 35 in) down, making it impossible for trees to grow. Instead, bare and sometimes rocky land can only support certain kinds of Arctic vegetation, low-growing plants such as moss, heath (Ericaceae varieties such as crowberry and black bearberry), and lichen.
Detailed explanation-5: -The temperatures are so cold that there is a layer of permanently frozen ground below the surface, called permafrost. This permafrost is a defining characteristic of the tundra biome. In the tundra summers, the top layer of soil thaws only a few inches down, providing a growing surface for the roots of vegetation.