Question

A biome with very cold temperatures and little rainfall is called a(n) ______________________.

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The layer of soil in polar tundra that is always frozen is called ______________________.
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Why are shallow-rooted plants, such as grasses and small shrubs, common in polar tundra?
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What is the main way alpine tundra differs from arctic tundra?
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Define the term tree line.
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Answer 1

Tundra

Permafrost

Only plants with shallow root systems grow in the Arctic tundra because the permafrost prevents plants from sending their roots down past the active layer of soil. ... Some of the plants that live in the Arctic tundra include mosses, lichens, low-growing shrubs, and grasses--but no trees.

The cold climate of the alpine tundra is caused by the low air temperatures, and is similar to polar climate. Alpine tundra is distinguished from arctic tundra in that alpine tundra typically does not have permafrost, and alpine soils are generally better drained than arctic soils.

The tree line is the edge of the habitat at which trees are capable of growing. It is found at high elevations and high latitudes. Beyond the tree line, trees cannot tolerate the environmental conditions.

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