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
In order to obtain virus-free plants through tissue culture the best method is:
1. protoplast culture
2. embryo culture
3. anther culture
4. meristem culture
The name of the Indian scientist associated with Green Revolution in India is
1. H.G. Khorana
2. M.S.Swaminathan
3. Homi Bhaba
4. C.N.R. Rao.
People recovering from long illness are often advised to include the alga Spirulina in their
diet because it
1. makes the food easy to digest
2. is rich in proteins
3. has antibiotic properties
4. restores the intestinal microflora.
Cattle fed with spoilt hay of sweet clover which contains dicumarol
1. are healthier due to a good diet
2. catch infections easily
3. may suffer vitamin K deficiency and prolonged bleeding
4. may suffer from beri beri due to deficiency of B vitamins