Q. No.Homozygous purelines in cattle can be obtained by:
1. mating of related individuals of same breed.
2. mating of unrelated individuals of same breed.
3. mating of individuals of different breed.
4. mating of individuals of different species.
1. mating of related individuals of same breed.
2. mating of unrelated individuals of same breed.
3. mating of individuals of different breed.
4. mating of individuals of different species.
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Select the incorrect statement regarding inbreeding:
| 1. | Inbreeding helps in elimination of deleterious alleles from the population |
| 2. | Inbreeding is necessary to evolve a pure-line in any animal |
| 3. | Continued inbreeding reduces fertility and leads to inbreeding depression. |
| 4. | Inbreeding depression cannot be overcome by out-crossing. |
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Interspecific hybridization is the mating of
1. more closely related individuals within same breed for 4-6 generations
2. animals within same breed without having common ancestors
3. two different related species
4. superior males and females of different breeds
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Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?
1. Mangur
2. Mrigala
3. Mackerel
4. Mystus
A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called
1. Ley farming
2. Contour farming
3. Strip farming
4. Shifting agriculture
Consider the following statements (a-d) about organic farming
a. Utilizes genetically modified crops like Bt cotton.
b. Uses only naturally produced inputs like compost.
c. Does not use pesticides and urea.
d. Produces vegetables rich in vitamins and minerals.
Which of the above statements are correct?
1. (a) and (b) only
2. (b), (c) and (d)
3. (c) and (d) only
4. (b) and (c) only
A collection of plants and seeds having diverse alleles of all the genes of a crop is called
1. Genome
2. Herbarium
3. Germplasm
4. Gene library
Breeding of crops with high levels of minerals, vitamins and proteins is called
1. Micropropagation
2. Somatic hybridization
3. Biofortification
4. Biomagnifications
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
1. Black rust of wheat
2. Bacterial leaf blight of rice
3. Downy mildew of grapes
4. Loose smut of wheat
Consider the following four measures (a-d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common
a. Spray with Bordeaux mixture
b. Control of 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. (a) and (d)
2. (b) and (c)
3. (a) and (b)
4. (c) and (d)
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