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प्रश्न
While studying the history of the domestication of various cultivated plants _______ were recognized earlier.
विकल्प
Centres of origin
Centres of domestication
Centres of hybrid
Centres of variation
उत्तर
While studying the history of the domestication of various cultivated plants Centres of origin were recognized earlier.
संबंधित प्रश्न
Give reason :
Emasculation is done in a flower which is selected as female parent.
What is ‘biofortification’?
Which steps would you follow to develop a new variety of crop plant by selective breeding?
(a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane quality grown in North India?
(b) Identify 'a', 'b' and 'c' in the following table:
| No. | Crop | Variety | Insect Pests |
| 1. | Brassica | Pusa Gaurav | (a) |
| 2. | Flat bean | Pusa Sem 2 Pusa sem 3 |
(b) |
| 3. | (c) | Pusa Sawani Pusa A-4 |
Shoot and fruit borer |
Name any two common Indian millet crops.
With the help of suitable diagram define 'bagging' and 'tagging' of flower.
Name the scientists who Coined the term Diffusion Pressure Deficit
Answer the following question.
How did plant breeding techniques help north Indian farmers to develop cane with desired characters?
Importing better varieties and plants from outside and acclimatizing them to the local environment is called
Crosses between the plants of the same variety are called
In hybridization experiments 'true breeding' means off-springs show ____________.
Sonora – 64 is a variety of ______.
Breeding of crops with high levels of minerals:
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 ______.
The agriculture sector of India employs about ______.
In the area of plant breeding, it is important not only to preserve the seeds of the variety being cultivated, but also to preserve all its wild relatives. Explain with a suitable example.
Name the improved characteristics of wheat that helped India to achieve green revolution.
Mutations are beneficial for plant breeding. Taking an example, justify the statement.
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 |
