Question

if global temperatures rise and cause the equators warm air to expand farther north and south, which biome distribution is most likely to shift as a result? a. polar tundra expanding toward the equator b. tropical rainforest bands shrinking c. deserts forming closer to the equator d. deserts shifting poleward from 30° latitude

Explanation:

Deserts are typically found around 30° latitude due to descending dry air. If the equator's warm - air expands farther north and south, the areas of descending dry air (where deserts form) will shift poleward from 30° latitude. Polar tundra would shrink due to warming, tropical rainforest bands may not necessarily shrink directly because of this warm - air expansion, and deserts are not likely to form closer to the equator as it is a wetter region.

Answer:

D. Deserts shifting poleward from 30° latitude