Free GRE Practice Question

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ID: GRE-TCQ-050
Section: GRE Verbal Reasoning - Text Completion
Difficulty level: Hard

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Conservation biologists have learned that removing a single predator can (i) __________ an entire ecosystem, as prey populations expand and overgraze the vegetation on which countless other organisms rely—a chain of consequences that belies the (ii) __________ appearance of the original intervention.

Blank (i)

Blank (ii)

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