Multiple Choice
Nitrogen is an essential nutrient for plant growth, but it must be available in a form plants can use.They can use ammonia (NH3) , but not atmospheric nitrogen gas (N2) .Legumes such as peas and beans have nodules on their roots that contain Rhizobium, a nitrogen-fixing bacterium that can trap N2 and transform it into NH3.Suppose two similar fields are planted, one with corn alone, and one with corn and soybeans combined.How would the growth of corn alone be likely to compare with the growth of corn combined with soybeans?
A) Corn alone would be nitrogen limited and show less growth.
B) Corn alone would prevent nitrogen limitation by finding a way to use N2.
C) Corn alone would grow better because it would not be competing with soybeans.
D) Corn alone would attract Rhizobium and develop root nodules to fix atmospheric N2.
E) Corn alone would grow at approximately the same rate with or without soybeans.
Correct Answer:
Verified
Correct Answer:
Verified
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