Q38 / 180 · NEET 2016 (Phase 2) · Botany

A lake which is rich in organic waste may result in

  • A
    Increased population of aquatic organisms due to minerals
  • B
    Drying of the lake due to algal bloom
  • C
    Increased population of fish due to lots of nutrients
  • Correct answer
    D
    Mortality of fish due to lack of oxygen

Solution

Micro-organisms involved in biodegradation of organic matter consume lot of oxygen, oxygen as a result there is a sharp decline in dissolved oxygen in water that causes mortality of fish and other aquatic creatures.

Hence, the correct answer is option: 'D'.

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