AP Environmental Sciencemediummcq1 pt
Legumes improve soil fertility because their root nodules
A.host nitrogen-fixing bacteria
B.produce phosphorus
C.photosynthesize in the dark
D.trap carbon from the air
Explanation
Core Concept
Rhizobium in legume nodules converts atmospheric N₂ to ammonia, enriching the soil for the legume and following crops.
Correct Answer
Ahost nitrogen-fixing bacteria
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