AP Environmental Scienceeasymcq1 pt
Unlike carbon and nitrogen, the phosphorus cycle
A.has no significant atmospheric phase
B.involves bacteria at every step
C.has its main reservoir in the air
D.moves faster than the water cycle
Explanation
Core Concept
Phosphorus moves from rock weathering through organisms and back to sediment — never as a major gas. That is why it limits productivity where rock supply is low.
Correct Answer
Ahas no significant atmospheric phase
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