Why are most plants that live in the cold. Iomega like that tundra usually shorter in size?

answer:

Tundra plants are small -- usually less than a foot high -- for four reasons. The soil lacks the nutrients of richer soils in other ecosystems that are filled with organic material. The plants’ short statures help them absorb heat from the dark soil, which helps keep them from freezing. Smaller plants are more protected from cold and winds. Roots also are short and grow sideways, as they cannot penetrate the permafrost. These plants tend to grow in clumps; clumping offers protection from the cold and from wind-driven particles of ice and snow. Examples of small tundra plants include Arctic crocus, lousewort, heather and cress.

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