Final answer:
The Arctic tundra is the major biome characterized by the absence of trees due to its low temperatures and short growing season.
Explanation:
Arctic tundra is the major biome characterized by the relative absence of trees. It is a vast, treeless biome found in the Arctic region with low temperatures and a short growing season. The vegetation in the tundra consists of grasses, mosses, lichens, and small shrubs.
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