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प्रश्न
Discuss briefly the technology that made us self-sufficient in food production.
उत्तर
Plant breeding is the purposeful manipulation of plant species in order to create desired plant types that are better suited for cultivation, give better yields and are disease resistant. With advancements in genetics, molecular biology and tissue culture, plant breeding is now increasingly being carried out by using molecular genetic tools.
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संबंधित प्रश्न
What are transgenic plants? Explain with any two examples
State one characteristic of millets that has been improved as a result of hybrid breeding so as to produce high yielding millet crops.
Explain the effect of light and temperature on photosynthesis.
Importing better varieties and plants from outside and acclimatizing them to the local environment is called
The science of changing and improving the heredity of plants is called ______
Mutations in plant cells can be induced by ______
Give two important contributions of Dr. M. S. Swaminathan.
Define the term ‘stress’ for plants. Discuss briefly the two types of stress encountered by plants.
Give few examples of biofortified crops. What benefits do they offer to the society?
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 |
