By what process does nitrogen enter the living components of ecosystems?
A.
B.
C.
D.
Correct. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Incorrect. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Animation 57.3 Quiz
How are humans influencing the nitrogen cycle?
A.
B.
C.
D.
Correct. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Incorrect. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Animation 57.3 Quiz
Which pathway represents the shortest path that a nitrogen atom in atmospheric nitrogen, N2, could travel and end up in a protein in a human?
A.
B.
C.
D.
Correct. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Incorrect. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Animation 57.3 Quiz
A student remarks that it is a good thing that humans discovered how to use industrial processes to fix nitrogen because this ensures that the nitrogen cycle can remain intact if nitrogen-fixing bacteria ever go extinct. Evaluate the accuracy of this statement.
A.
B.
C.
D.
Correct. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations
Incorrect. See Key Concept 57.4 Nutrient Cycling in Ecosystems Involves Chemical and Biological Transformations