The ______ cycle begins with the weathering of rock.
A) phosphorus
B) nitrogen
C) water
D) energy
E) carbon
Correct Answer:
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Q9: Species that are the first to colonize
Q21: Carbon returns to the atmosphere
A) as carbon
Q22: _ bacteria return nitrogen to the atmosphere
Q24: An organism's _ is its position in
Q30: As an overall average,about _ of the
Q32: Nitrogen-fixing bacteria convert N2 into
A)nitrates.
B)ammonium ions.
C)nitrites.
D)carbon dioxide.
E)methanE.
Q33: Decomposers
A) obtain nutrients from detritus.
B) return organic
Q33: The total amount of energy trapped by
Q37: Which of the following is NOT an
Q39: Which of the following ecosystems has a
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