Download App

Environmental Issues — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYEnvironmental Issues2 Marks
Question
Sewage discharge into a clean-water body leads to increased fish mortality. Explain.
✓

Answer

Leads to increase in nutrients, promotes algal growth, increases BOD reduces dissolved oxygen. (aquatic animals deprived of oxygen leading to death), some bloom farming algae are extremely toxic to fish/other pollutants of sewage.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions." from Environmental Issues→Environmental Issues — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Draw a labelled diagram of a scrubber and mention its use to remove pollutants.
→
How Biotechnology is applicable with respect to Genomics?
→
What are induced mutation? Give one example each of physical and chemical mutagen.
→
Give the location of following valves within human heart :
(a) Eustachian valve
(c) Bicuspid valve
(b) Thebesian valve
(d) Tricuspid valve
→
Give a neat and labelled sketch of the germinating angiospermic pollen grain.
→
If a marine fish is placed in a fresh water aquarium, will it be able to survive? Give reason.
→
Write the name of condition in which pollen grains mature prior to stigma in bisexual reproduction.
→
What is the mechanism of actions of statins?
→
Is it true that carpets and curtains/ drapes placed on the floor or wall surfaces can reduce noise level. Explain briefly?
→
List the differences between Turner's syndrome and Klinefelter's syndrome.
→