Q173 / 180 · NEET 2016 (Phase 1) · Zoology

A river with an inflow of domestic sewage rich in organic waste may result in:

  • A
    Drying of the river very soon due to algal bloom.
  • B
    Increased population of aquatic food web organisms.
  • C
    An increased production of fish due to biodegradable nutrients.
  • Correct answer
    D
    Death of fish due to lack of oxygen.

Solution

A river with an inflow of domestic sewage rich in organic waste will reduce the dissolved oxygen (DO) and may result in death of fish due to lack of oxygen.

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

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