A collection of plants and seeds having diverse alleles of all the genes of a crop is called
1. germplasm
2. gene library
3. genome
4. herbarium
'Himgiri' developed by hybridisation and selection for disease resistance against rust pathogens is a variety of
1. maize
2. sugarcane
3. wheat
4. chilli
When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often
superior to both its parents. This phenomenon is called
1. transformation
2. splicing
3. metamorphosis
4. heterosis
Breeding of crops with high levels of minerals, vitamins and proteins is called
1. somatic hybridisation
2. biofortification
3. biomagnification
4. micropropogation
Somaclones are obtained by
1. tissue culture
2. plant breeding
3. irradiation
4. genetic engineering
In 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 electrical field for further
development in culture media
4. from this upto 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. New castle disease
4. Pasteurellosis
Crop plants grown in monoculture are:
1. low in yield
2. free from intraspecific competition
3. characterised by 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 millete
3. sugarcane
4. barley