The total amount of energy trapped by the autotrophs of an ecosystem is called
A) net primary consumption.
B) gross primary productivity.
C) gross primary consumption.
D) net primary productivity.
E) net energy fixation.
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
Q28: Organisms that obtain their energy from producers
Q29: Biomagnification occurs with chemicals that
A) dissolve 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
Q35: The _ cycle begins with the weathering
Q37: Which of the following is NOT an
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