Ncert solutions for class 12 biology English medium

Ncert solutions for class 12 biology English medium updated 2021-22

NCERT Solutions for Class 12 Biology Chapter 16 Environmental Issues

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 16 Environmental Issues Question 1.What are the various constituents of domestic sewage ? Discuss the effects of sewage discharge on a river.Solution:The domestic sewage contains every-thing that goes down the drain into the sewer …

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NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 15 Biodiversity and Conservation Question 1.Name the three important components of biodiversitySolution:The three important components of biodiversity are genetic diversity, species diversity and ecological diversity. These components are the basic building blocks of biodiversity. …

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NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem Question 1.Fill in the blanks(a) Plants are called as ___ because they fix carbon dioxide.(b) In an ecosystem dominated by trees, the pyramid (of numbers) is ___ type.(c) In aquatic ecosystem, the …

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NCERT Solutions for Class 12 Biology Chapter 13 Organisms and Populations

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 13 Organisms and Populations Question 1.How is diapause different from hibernation ?Solution:Diapause is different from hibernation. The table below shows the differences between them : Question 2.If a marine fish is placed in a …

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NCERT Solutions for Class 12 Biology Chapter 11 Biotechnology: Principles and Processes

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 11 Biotechnology : Principles and Processes Question 1.Make a chart (with diagrammatic representation) showing a restriction enzyme, the substrate DNA on which it acts, the site at which it cuts DNA and the product …

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NCERT Solutions for Class 12 Biology Chapter 12 Biotechnology and Its Applications

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 12 Biotechnology and Its Applications Question 1.Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because(a) bacteria are resistant to the toxin(b) toxin is immature(c) toxin is inactive(d) bacteria …

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NCERT Solutions for Class 12 Biology Chapter 10 Microbes in Human Welfare

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 10 Microbes in Human Welfare Question 1.Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your …

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NCERT Solutions for Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production Question 1.Explain in brief the role of animal husbandry in human welfare.Solution: Animal husbandry evolves new techniques and technologies for the management of livestock like buffaloes, cows, …

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NCERT Solutions for Class 12 Biology Chapter 8 Human Health and Diseases

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 8 Human Health and Diseases Question 1.What are the various public health measures, which you would suggest as a safeguard against infectious diseases?Solution:Prevention and control of infectious diseases I. For water-borne diseases like typhoid, …

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NCERT Solutions for Class 12 Biology Chapter 7 Evolution

These Solutions are part of NCERT Solutions for Class 12 Biology. Here we have given NCERT Solutions for Class 12 Biology Chapter 7 Evolution Question 1.Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.Solution:Penicillin when discovered was used as an antibiotic against all bacteria. Soon many of these became resistant. This is because …

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