Home
Class 12
BIOLOGY
Entry of sewage in water caused a spurt ...

Entry of sewage in water caused a spurt in the growth of alage but killed fish due to:

A

Decrease in nutrients

B

Reduction in light

C

Depletion of `O_2`

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • DIGESTION AND ABSORPTION

    MBD PUBLICATION|Exercise Question Bank|165 Videos

  • ECOSYSTEMS

    MBD PUBLICATION|Exercise QUESTION BANK|255 Videos

Similar Questions

Explore conceptually related problems

Fishes die in water bodies polluted by sewage due to :

Introduction of Nile Perch in lake Victoria of South Africa resulted in (a) Excessive growith of water weeds (b) Eliminations of water weeds (c) Elimination of many species of cichild fish (d) Excessive growth of cichild fish.

Minamata disease is caused by due to presenec of ---- in water.

Disease caused by eating fish found in water contaminated with industrial waste having mercury is :

Read the following statements about 'Terror of Bengal' and select the correct ones. (i) 'Terror of Bengal' is the name given to water hyacinth (Eichhornia), an algae. (ii) Eichhornia was introduced in India due to its aesthetic value. (iii) Eichhornia drains oxygen from the water which leads to death of fishes.

A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when (a) the sporozoites released from RBCs are being rapidly killed and broken down inside spleen (b) the trophozoites reach maximum growth and give out certain toxins (c) the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs (d) the microgametocytes and megagametocyte are being destroyed by the WBCs

Express in one word only: Accumulated biomass due to secondary treatment of sewage water is called.