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प्रश्न
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed ______.
विकल्प
recombinant DNA technology
transgenic mechanism
mutation breeding
gene therapy
उत्तर
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed mutation breeding.
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संबंधित प्रश्न
Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.
How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped.
Name the following: The semi-dwarf variety of wheat is high-yielding and disease-resistant.
How has mutation breeding helped in improving the production of mung bean crop?
Name any two common Indian millet crops.
Give a reason for the following:
Bagging is essential in artificial hybridization.
It is said, that diseases are spreading faster due to globalisation and increased movement of people. Justify the statement taking the example of H5N1 virus.
Mutations are beneficial for plant breeding. Taking an example, justify the statement.
Discuss briefly the technology that made us self-sufficient in food production.
Match the following:
| Sr. No. | Column I | Column II | |
| (i) | Eutrophication | (a) | A soil erosion |
| (ii) | Biomagnification | (b) | carbon monoxide, methane |
| (iii) | Particulate pollutant | (c) | Prevention of extinction |
| (iv) | Conservation | (d) | Dust, smog |
| (v) | Gaseous pollutants | (e) | Accumulation of nonbiodegradable substances |
| (vi) | Deforestation | (f) | Death of aquatic ecosystem |
