Download App

Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare2 Marks
Question
What is the key difference between primary and secondary sewage treatment?
✓

Answer

Primary (1°) treatment is a physical process that involves for removal of particulate as settelable particle. Secondary (2°) treatment is purely a biological treatment involving microbial oxidation.

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 "2 Marks Questions" from Microbes in Human Welfare→Microbes in Human Welfare — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Differentiate between rDNA and cDNA.
→
State the functions of Ribozyme and release factor in protein synthesis, respectively.
→
Write an account on Montreal Protocol.
→
Differentiate between a cistron and an exon.
→
What is the role of lysing enzyme in biotechnology?
→
How would you find genotype of a tall pea plant bearing white flowers? Explain with the help of a cross. Name the type of cross you would use.
→
How has the bacterium Bacillus thuringiensis helped us in controlling caterpillars of insect pests?
→
Explain why the term ‘homozygous’ and ‘heterozygous’ with respect to an X–linked trait are applicable to human females but not to human males?
→
Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.
→
Restriction enzymes present in the cloning site of a vector should not have more than one recognition site. Comment.
→