In the systems approach to biogeochemical cycles,
A) nutrients are found in sinks.
B) fluxes are the pathways of net gain or loss of nutrients.
C) the cycle must be in equilibrium.
D) the boundaries of the ecosystem are not defined.
E) none of the above
Correct Answer:
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Q2: In the carbon cycle,
A) photosynthesis always balances
Q3: Nitrogen fixation
A) is the product of respiration
Q4: Mutualistic bacteria in legumes
A) include the cyanobacteria.
B)
Q5: Eutrophication occurs when
A) trophic levels change.
B) nitrogen
Q6: The phosphorus cycle differs from the nitrogen
Q7: The carbon cycle differs from the nitrogen
Q8: The increase in oxygen in the atmosphere
A)
Q9: Which of the following is not a
Q10: Which of the following is not a
Q11: Human agriculture is threatened by
A) humus in
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