The _____________________ cycle begins with the weathering of rock.
A) Phosphorous cycle
B) Nitrogen cycle
C) Water cycle
D) Energy cycle
E) Carbon cycle
Correct Answer:
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Q21: The "net primary productivity" is:
A)The amount of
Q22: An organism that can use energy and
Q23: Carbon returns to the atmosphere:
A)As carbon dioxide
B)From
Q24: Decomposers:
A)Obtain nutrients from detritus
B)Return organic molecules to
Q25: Nitrogen-fixing bacteria convert N2 into _.
A)Nitrates
B)Ammonia
C)Nitrites
D)Carbon dioxide
E)Methane
Q27: The type of succession that occurs in
Q28: A food chain is a series of
Q29: Secondary consumers:
A)Are carnivores
B)Are herbivores
C)Are bacteria
D)Are fungi
E)All are
Q30: In the water cycle,animals return water to
Q31: In _ bacteria return nitrogen to the
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