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प्रश्न
Fungicides and antibiotics are chemicals that ______.
पर्याय
enhance yield and disease resistance
kill pathogenic fungi and bacteria, respectively
kill all pathogenic microbes
kill pathogenic bacteria and fungi respectively
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उत्तर
Fungicides and antibiotics are chemicals that kill pathogenic fungi and bacteria, respectively.
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संबंधित प्रश्न
Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.
Give reason :
Emasculation is done in a flower which is selected as female parent.
Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.
Plant breeding technique has helped sugar industry in North India. Explain how.
What is emasculation?
What are transgenic plants? Explain with any two examples
What is heterosis?
Give an account of mutation breeding with examples.
Which one of the following crop varieties correct matches with its resistance to disease?
| Variety | Resistance to disease |
| a) Pusa Komal | Bacterial blight |
| b) Pusa Sadabahar | White rust |
| c) Pusa Shubhra | Chilli mosaic virus |
| d) Brassica | Pusa swarnim |
Smooth leaved and necterless cotton varieties are NOT affected by ____________.
Mechanism of fast Speciation in crop plants is ______.
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed ______.
33 percent of India’s Gross Domestic Product comes from ______.
What is meant by ‘hidden hunger’?
Name the improved characteristics of wheat that helped India to achieve green revolution.
Discuss natural selection and artificial selection. What are the implications of the latter on the process of evolution?
You are a Botanist working in the area of plant breeding. Describe the various steps that you will undertake to release a new variety.
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 |
