In the phosphorus cycle the ultimate source of phosphorus is
A) rock.
B) dead organisms.
C) plants.
D) the sun.
Correct Answer:
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Q2: In the carbon cycle the two primary
Q3: As with all organic molecules, carbon forms
Q4: The role of decomposers is important to
Q5: Most of the processes that influence the
Q6: The hydrologic cycle involves
A) the formation of
Q7: A demonstration of the second law of
Q8: The difference between an ecosystem and a
Q9: The amount of plant biomass in an
Q10: Decomposers
A) are unimportant links in a food
Q11: A food chain always begins with
A) sympathetic
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