In an Area with Nitrogen-Poor Soil, Legumes Often Dominate Over

question 49

Multiple Choice

In an area with nitrogen-poor soil, legumes often dominate over other plants because they

• A) have unique access to the large atmospheric pool of nitrogen thanks to their symbiotic bacteria.
• B) do not need nitrogen at all.
• C) have long taproots that can extract nitrogen from deeper down in the soil.
• D) obtain supplemental nitrogen by trapping insects and other prey.
• E) inhibit the growth of denitrifying bacteria around their roots, thus keeping more nitrate in the soil.

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