Q. No.A plant disease not caused by a fungal pathogen will be:
| 1. | Brown rust of wheat | 2. | Black rot of crucifers |
| 3. | Red rot of sugarcane | 4. | Late blight of potato |
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Identify the option where all columns are correctly matched:
|
|
Crop |
Variety |
Resistant to |
|
1. |
Rapeseed mustard |
Pusa Sawani |
Shoot and fruit borer |
|
2. |
Chilli |
Himgiri |
Chilli mosaic virus |
|
3. |
Cauliflower |
Pusa Shubhra |
Bacterial blight |
|
4. |
Flat bean |
Pusa Sem 2 |
Aphids |
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In north India, a sugarcane farmer would be best advised to grow:
| 1. | Saccharum barberi |
| 2. | Saccharum officinarum |
| 3. | A hybrid of Saccharum barberi and Saccharum officinarum |
| 4. | A hybrid of Saccharum officinarum and a grass Aegilops squarrosa |
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Methylophilus methylotrophus is a source of:
| 1. | Bioinsecticide | 2. | Single cell protein |
| 3. | Thrombolytic | 4. | Clotting factors |
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Identify the incorrectly matched pair:
| Column I | Column II | |
| 1. | Sonalika and Kalyan Sona | Improved varieties of wheat |
| 2. | Jaya and Ratna | Improved varieties of maize |
| 3 | Saccharum Barberi | Poor sugar content and yield |
| 4. | Saccharum officinarum | High sugar content and thick stems |
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The most important species of honeybee reared in India is:
| 1. | Apis indica | 2. | Apis mellifera |
| 3. | Apis dorsata | 4. | Apis florea |
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Practically all hybrids of poultry and swine are produced by:
1. crossing inbred stocks
2. introduction of exotic breeds
3. crossing genetically similar parents
4. mutation breeding
Consider the following statements:
| I: | Self-pollination or selfing is the extreme form of inbreeding. |
| II: | Loss of vigor associated with inbreeding is inbreeding depression. |
| III: | Self-pollinated crops do not usually show the ill effects of inbreeding. |
The correct statements are:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
In mung bean, resistance to yellow mosaic virus and powdery mildew was introduced by:
| 1. | Agrobacterium mediation | 2. | Somatic hybridization |
| 3. | Micropropagation | 4. | Mutation breeding |
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Consider the two statements:
| I: | Inbreeding is an important strategy in animal breeding experiments. |
| II: | It exposes recessive harmful genes that are eliminated by selection. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | Only I is correct. |
| 4. | Both I and II are incorrect. |
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