Q. No.
When two unrelated individuals or lines crossed, the performance of F1 hybrid is of superior to both its parents. This phenomenon is called:
1. transformation
2. splicing
3. metamorphosis
4. heterosis
1. transformation
2. splicing
3. metamorphosis
4. heterosis
Breeding of crops with high levels of minerals, vitamins, and proteins is called:
| 1. | somatic hybridization |
| 2. | biofortification |
| 3. | biomagnification |
| 4. | micropropagation |
Which one is the wrong pairing for the disease and its causal organism?
1. Late blight of potato: Alternaria solani
2. Black rust of wheat-Puccinia graminis
3. Loose smut of wheat-Ustilago nuda
4. Root-knot of vegetables-Meloidogyne sp
Consider the following four measures (A.D) that could be taken to successfully grow chickpeas in an area where bacterial blight disease is common:
| (A) | spray with Bordeaux mixture |
| (B) | control of the insect vector of the disease pathogen |
| (C) | use of only disease-free seeds |
| (D) | use of varieties resistant to the disease |
Which two of the above measures can control the disease?
1. B and C
2. A and B
3. C and D
4. A and D
1. Bacterial leaf blight of rice
2. Downy mildew of grapes
3. Loose smut of wheat
4. Black rust of wheat
1. Xanthomonas
2. Pseudomonas
3. Alternaria
4. Erwinia
In the cloning of cattle, a fertilized egg is taken out of the mother's womb and:
| 1. | the egg is divided into 4 pairs of cells which are implanted into the womb of other cows |
| 2. | in the eight-cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows |
| 3. | in the eight-cell stage, the individual cells are separated under an electrical field for further development in cultural media |
| 4. | from this, up to eight identical twins can be produced |
In maize, hybrid vigour is exploited by:
1. bombarding the seeds with DNA
2. crossing of two inbred parental lines
3. harvesting seeds from the most productive plants
4. inducing mutations
Which one of the following is a viral disease of poultry?
1. Salmonellosis
2. Coryza
3. Newcastle disease
4. Pasteurellosis
Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?
1. Euphorbia
2. Beetroot
3. Sugarcane
4. Pongamia
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