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.
Correct Answer:
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