The Tundra Is

question 108

Multiple Choice

The tundra is

• A)treeless because of a year-round moisture deficit.
• B)treeless because temperatures are too cold for trees to tolerate.
• C)covered with trees because the trees have adapted to the low moisture conditions in the tundra.
• D)covered with trees because tress have developed special biochemical "antifreezes" that enable them to survive under the cold conditions in the tundra.
• E)treeless from overgrazing by caribou.

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