ECOLOGY
BIOMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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has a layer of soil that is permanently frozen beneath the top soil.
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is too cold to support insect life.
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is resistant to environmental damage because it is usually frozen.
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All of the above
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Detailed explanation-1: -Permafrost is a permanently frozen layer below Earth’s surface. It consists of soil, gravel, and sand, usually bound together by ice.
Detailed explanation-2: -The tundra is sometimes called the frozen desert. In areas with tundra the ground is frozen the whole year. This permanently frozen ground is called permafrost. Very short shrubs grow in the tundra.
Detailed explanation-3: -Permafrost is soil, sediment or rock that is perennially frozen and may or may not contain a significant amount of ice. The soil layer on top of the permafrost is called the active layer because it freezes in winter and and thaws in the summer.
Detailed explanation-4: -Permafrost is found in places where the average annual temperature is below about 23°F (-5° C), including most of the Arctic and all of Antarctica. Land with underlying permafrost is called tundra. The arctic tundra is stark and treeless.