AP Environmental Science Quiz
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LAND AND WATER USE
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A farmer uses biological control; pest levels drop, then stabilize above zero. Which interpretation is most accurate?
A
Biological control often suppresses pests to manageable levels rather than eradication, maintaining a predator–prey balance over time.
B
The stabilization proves the predators failed completely, so the only solution is immediate application of persistent organochlorines.
C
Stable pest levels indicate the pests became producers, so they now create energy and no longer harm crops.
D
Any nonzero pest level means economic thresholds cannot be used, because thresholds require total elimination of pests.
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