Q. No.Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
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
Crop plants grown in monoculture are:
1. low in yield
2. free from intraspecific competition
3. characterized by a poor root system
4. highly prone to pests
Triticale, the first man-made cereal crop, has been obtained by crossing wheat with:
1. rye
2. pearl millet
3. sugarcane
4. barley
Select the incorrect statement:
| 1. | Inbreeding helps in the accumulation of superior genes and the elimination of undesirable genes |
| 2. | Inbreeding increases homozygosity |
| 3. | Inbreeding is essential to evolve pure lines in any animal |
| 4. | Inbreeding selects harmful recessive genes that reduce fertility and productivity |
Hisardale a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Merino rams is an example of
1. Outcrossing
2. Cross-breeding
3. Interspecific hybridisation
4. Outbreeding
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