environment medium mcq

Which of the following is a characteristic of an oligotrophic lake?

  1. High nutrient levels and algal blooms
  2. Low nutrient levels and clear water
  3. High turbidity and low oxygen
  4. Eutrophic conditions with fish kills

Answer: Low nutrient levels and clear water

Oligotrophic lakes have low productivity, clear water, and high oxygen levels, contrasting with nutrient-rich eutrophic lakes.

Topic Water Resources and Conservation
Exam Relevance UPSC, SSC

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