Q. No.Today, all our major food crops are derived from:
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture
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Cross hybridisation among the selected parents is frequently used for the improvement of crop plants. Which of the following is not a shortcoming of the process?
| 1. | The combination of desired characters may always not be possible |
| 2. | It can be a tedious and time-consuming process |
| 3. | Undesirable characters may get introduced |
| 4. | The number of progeny is very limited |
Resistance to the yellow mosaic virus in bhindi (Abelmoschus Esculentus) was possible by:
| 1. | Conventional hybridization | 2. | Mutations |
| 3. | Genetic engineering | 4. | Tissue culture |
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Breeding crops with higher levels of vitamins and minerals, or higher protein and healthier fats is called:
| 1. | Bioremediation | 2. | Biofortification |
| 3. | Food adulteration | 4. | Biomagnification |
Any part of a plant taken out and grown in a test tube under sterile conditions in special nutrient media for generating new plants is called:
| 1. | Implant | 2. | Explant |
| 3. | Supplant | 4. | Plantlet |
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The management of animals for milk and its products for human consumption is called:
| 1. | Animal breeding | 2. | Dairying |
| 3. | Domestication | 4. | Animal husbandry |
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Classical plant breeding involves:
| 1. | Crossing or hybridization of pure lines and hardening |
| 2. | Crossing or hybridization of wild varieties and artificial selection |
| 3. | Crossing or hybridization of wild varieties and inbreeding |
| 4. | Crossing or hybridization of pure lines and artificial selection |
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Insect resistance in host crop plants may be due to morphological, biochemical, or physiological characteristics. Identify the correct statements:
| I: | Hairy leaves in several plants are associated with resistance to jassids in cotton and cereal leaf beetle in wheat. |
| II: | In wheat, solid stems lead to non-preference by the stem sawfly and smooth-leaved and nectar-less cotton varieties do not attract bollworms. |
| III. | High aspartic acid, low nitrogen and sugar content in maize lead to resistance to maize stem borers. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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Match biofortified crops in Column I with enriched nutrients in Column II and select the correct answer from the codes given:
|
|
Column I |
|
Column II |
|
A. |
Maize hybrids |
a. |
lysine and tryptophan |
|
B. |
Atlas 66 |
b. |
high protein content |
|
C. |
Golden rice |
c. |
Vitamin A |
Code
| A | B | C | |
| 1. | a | b | c |
| 2. | a | c | b |
| 3. | b | a | c |
| 4. | c | a | b |
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Which of the following is the most important factor that would lead to increased milk yield
in cattle?
1. Selection of good breeds
2. Selection of good breeds
3. Stringent cleanliness and hygiene
4. Provision of ideal environmental conditions for cattle
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