Q. No.A group of animals that are related by descent and share many similarities is referred to as:
1.
breed
2.
race
3.
variety
4.
species
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Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed:
1. recombinant DNA technology
2. transgenic mechanism
3. mutation breeding
4. gene therapy.
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The term ‘totipotency’ refers to the capacity of a:
1. cell to generate the whole plant
2. bud to generate the whole plant
3. seed to germinate
4. cell to enlarge in size
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Given below are a few statements regarding somatic hybridization. Choose the correct statements:
| (i) | protoplasts of different cells of the same plant are fused. |
| (ii) | protoplasts from cells of different species can be fused. |
| (iii) | treatment of cells with cellulase and pectinase is mandatory. |
| (iv) | the hybrid protoplast contains characters of only one parental protoplast. |
| 1. | (i) and (iii) | 2. | (i) and (ii) |
| 3. | (i) and (iv) | 4. | (ii) and (iii) |
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The biggest constraint of plant breeding is:
1. availability of desirable gene in the crop and its wild relatives
2. infrastructure
3. trained manpower
4. transfer of genes from unrelated sources.
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Micro-propagation is:
1. propagation of microbes in vitro
2. propagation of plants in vitro
3. propagation of cells in vitro
4. growing plants on a smaller scale
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Protoplast is:
| 1. | another name for protoplasm | 2. | an animal cell |
| 3. | a plant cell without a cell wall | 4. | a plant cell |
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Which one of the following products of apiculture is used in cosmetics and polishes?
| 1. | honey | 2. | propolis |
| 3. | wax | 4. | Royal jelly |
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More than 70 per cent of livestock population is found in:
| 1. | Denmark | 2. | India |
| 3. | China | 4. | India and China |
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