Q. No.The plantlets produced during plant tissue culture are called somaclones because:
1.
They can be produced in a very short span of time
2.
They are the result of the somatic hybridization of two cells
3.
The gametes develop parthenogenetically to produce genetically identical plantlets
4.
They are genetically identical to the original plant from which they were grown
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Consider the following statements regarding bird flu:
I. Viruses causing bird flu belong to Influenza virus A strain
II. The most pathogenic strain of this virus causing bird flu is H1N1
III. Culling and vaccinating livestock is a short term strategy to prevent flu pandemic.
IV. A human vaccine is available to control the spread of disease in human populations.
Of the above statements, the correct are:
1. I and III only
2. II and IV only
3. I, III and IV only
4. I, II, III and IV
Hisardale is a new breed of:
| 1. | Sheep developed by crossing Bikaneri ewes and Marino rams. |
| 2. | Sheep developed by crossing Bikaneri rams and Marino ewes. |
| 3. | Goat developed by crossing Bikaneri ewes and Marino rams. |
| 4. | Goat developed by crossing Bikaneri rams and Marino ewes. |
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Which of the following is not correctly matched?
| 1. | Green revolution - A significant increase in agricultural productivity resulting from the introduction of high-yield varieties of grains, the use of pesticides, and improved management techniques. |
| 2. | White revolution – Also called as Operation Flood, it refers to a significant increase in milk production which made India the largest milk producer in the world. |
| 3. | Blue revolution - Management of water resources that can steer humanity to achieve drinking water and crop irrigation security. |
| 4. | Pisciculture - The farming of aquatic organisms such as fish, shellfish, and even plants. |
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Arrange the following steps of a plant breeding program in a correct chronological manner:
| I. | Selection and testing of superior recombinants |
| II. | Collection of variability |
| III. | Cross hybridisation among the selected parents |
| IV. | Evaluation and selection of parents |
| V. | Testing, release, and commercialisation of new cultivars |
| 1. | II, IV, I, III, V | 2. | IV, I, II, III, V |
| 3. | II, IV, III, I, V | 4. | IV, III, II, I, V |
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The main reason for the success of the green revolution was:
1. Improvement in the efficiency of chemical pesticides
2. Improvement in irrigation facilities
3. Equitable distribution of land among farmers
4. Development of HYV varieties
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Conventional breeding is often constrained by the availability of a limited number of disease-resistance genes that are present and identified in various crop varieties or wild relatives. This is most commonly overcome by:
| 1. | Inducing mutations | 2. | Somaclonal variations |
| 3. | Genetic engineering | 4. | Plant introduction |
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PusaSem 2, a variety of flat bean, is resistant to all the following pests except:
| 1. | Aphids | 2. | Jassids |
| 3. | Fruit borer | 4. | Bollworm |
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The algae Spirulina, Chlorella and the microbe Methylophilus methylotrophus can be used as a source of:
| 1. | Vitamin A and C | 2. | Minerals like calcium |
| 3. | Single Cell Protein | 4. | Omega 3 fatty acids |
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The best method for producing plants free of viruses will be:
| 1. | Meristem culture | 2. | Embryo culture |
| 3. | Somatic embryogenesis | 4. | Somatic hybridization |
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