The arctic tundra is a biome characterized by extremely cold temperatures, low biodiversity, long winters and short summers. It's found in the northernmost parts of North America, Europe, and Asia near the North Pole.
Permafrost: A thick subsurface layer of soil that remains frozen throughout the year.
Biome: A large naturally occurring community occupying a major habitat e.g., forest or tundra.
Biodiversity: Variety within species, between species and ecosystems.
AP Biology - 5.5 Environmental Effects on Phenotype
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