Question
What is sewage? How sewage is harmful for us?
✓
Answer
→ We know that large quantities of waste water are generated everyday in cities and towns. A major component of this waste water is human excreta. This municipal waste water is also called sewage.
→ It contains large amounts of organic matter and microbes, many of which are pathogenic.
→ This cannot be discharged into natural water bodies like rivers and streams directly.
→ Before disposal, hence, sewage is treated in Sewage Treatment Plant (STPs) to make it less polluting.
→ The pollutants and pathogens in sewage cause water-borne animal disease like typhoid, cholera etc.
→ It contains large amounts of organic matter and microbes, many of which are pathogenic.
→ This cannot be discharged into natural water bodies like rivers and streams directly.
→ Before disposal, hence, sewage is treated in Sewage Treatment Plant (STPs) to make it less polluting.
→ The pollutants and pathogens in sewage cause water-borne animal disease like typhoid, cholera etc.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Identify the given diagram. What it is used for?
Where does fertilisation normally take place in a human female?
Describe the responsibility of GEAC setup by the Indian Government.
Find the developmental stages of an animal by using various resources like school library or internet and discuss with your teacher.
What is Ecosystem? Describe its types.
Study the figure given and answer the questions.
i. How does the repressor molecule get inactivated?
ii. When does the transcription of lac mRNA stop?
iii. Name the enzyme transcribed by the gene z.
i. How does the repressor molecule get inactivated?
ii. When does the transcription of lac mRNA stop?
iii. Name the enzyme transcribed by the gene z.
For the $MN-$blood group system, the frequencies of $M$ and $N$ alleles are $0.7$ and $0.3,$ respectively. The expected frequency of $MN-$blood group bearing organisms is likely to be:
→Tell about other methods of introducing foreign DNA into host cells.
- Name the molecule 'M' that binds with the operator.
- Mention the consequences of such binding.
- What will prevent the binding of the molecule 'M' with the operator gene? Mention the event that follows.
How do cellular barriers and cytokine barriers provide innate immunity in humans?