SAT Subject Biology Practice Question 131: Answer and Explanation

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Question: 131

1. A biome that contains a layer of permanently frozen soil, called permafrost, would be classified as

A. taiga
B. desert
C. tundra
D. savannah
E. temperate deciduous forest

Correct Answer: C


A tundra is a dry biome with a climate cool enough to maintain a permanently frozen region of soil known as permafrost. Both taiga and temperate deciduous forests can be found in northern regions of the northern hemisphere, but both lack the permanent layer of frozen soil known as permafrost. Desert biomes are characterized by their lack of precipitation, and they distinctly lack permafrost. A savannah is a grassland characterized by an open canopy and seasonal rainfall.

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