HSC Geography Practice Questions - HSC Geography (NSW Higher School Certificate, Year 12) Exam

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Why are ecosystems located in extreme environmental conditions (such as polar tundras or arid deserts) generally considered highly vulnerable?

They operate under existing environmental stress and feature specialized species with narrow tolerance ranges They experience exceptionally high rates of net primary productivity year-round They possess complex food webs with multiple redundant trophic pathways They have extensive geographical boundaries that protect them from human encroachment

Correct Answer:

They operate under existing environmental stress and feature specialized species with narrow tolerance ranges

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