Home
Class 12
BIOLOGY
At the sweage discharge point of river, ...

At the sweage discharge point of river, high mortality of fishes occured. Choose the most correct reason for this :-

A

Algal bloom

B

Low BOD

C

Very low dissolved oxygen

D

Eutrophication

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MAJOR TEST 8

    NEET MAJOR TEST (COACHING)|Exercise BIOLOGY|83 Videos

  • NEET 2020 TEST 5

    NEET MAJOR TEST (COACHING)|Exercise BIOLOGY|90 Videos

Similar Questions

Explore conceptually related problems

Choose most correct relation CHILD : FAMILY : :

There is mass mortality of fishes in a pond. What may be the reasons?

A lake near a village suffered heavy mortality of fishes within a few day. Consider the following reasons for this?

There is a mass mortality of fish in a pond. What may be the reason?

A lake near a village suffered heavy mortality of fishes within a few days Consider the following reasons for this? (a) Lots of urea and phosphate fertilizers were used in the crops in the vicinity. (b) The area was sprayed with DDT by an aircraft. (c) The lake water turned green and stinky. (d) Phytoplankton population in the lake declined initially thereby greatly reducing photosynthesis. Which two of the above were the main causes of fish mortality in the lake?

NEET MAJOR TEST (COACHING)-MAJOR TEST 9-BIOLOGY
  1. Bacillus thuringiensis is used to control

    Text Solution

    |

  2. If zygote or early embryo upto 8 blastomere is transferred into fallop...

    Text Solution

    |

  3. At the sweage discharge point of river, high mortality of fishes occur...

    Text Solution

    |

  4. Renal calculi are formed by :–

    Text Solution

    |

  5. Which is not correctly matched in the following ?

    Text Solution

    |

  6. A multicellular, filamentous alga exhibits a type of sexual life cycle...

    Text Solution

    |

  7. Select the incorrect match :-

    Text Solution

    |

  8. In porifera which type of fertilization takes place ?

    Text Solution

    |

  9. The original variety of beak in Darwin's finch was:

    Text Solution

    |

  10. BOD values of different samples of water are given :- Which of the...

    Text Solution

    |

  11. Who is the father of ecosystem ecology?

    Text Solution

    |

  12. Biological control agent is obtained from :-

    Text Solution

    |

  13. How many organism in the list given below are N2​-fixer autotrophs ? ...

    Text Solution

    |

  14. Which of the following is incorrect ?

    Text Solution

    |

  15. In dorsiventral leaves, the location of xylem and spongy tissue toward...

    Text Solution

    |

  16. In animals, chromosome number is maintained constant from one generati...

    Text Solution

    |

  17. A pure tall plant is reared in soil poor in nutrition and reached the ...

    Text Solution

    |

  18. Hypophysation technique is used in which culture ?

    Text Solution

    |

  19. Which is the correct pathway of pulmonary circulation ?

    Text Solution

    |

  20. In plant nutrition elements are classified as major or minor depending...

    Text Solution

    |