CBSE
Multiple Choice QuestionsIn maize, hybrid vigour is exploited by
bombarding the seeds with DNA
crossing of two inbred parental lines
harvesting seeds from the most productive plants
harvesting seeds from the most productive plants
Which one of the following is a viral disease of poultry?
Salmonellosis
Coryza
New castle disease
New castle disease
Polyethylene glycol method is used for
gene transfer without a vector
biodiesel production
seedless fruit production
seedless fruit production
Main objective of production/use of herbicide resistant GM crops is to
eliminate weeds from the field without the use of manual labour
eliminate weeds from the field without the use of herbicides
encourage eco- friendly herbicides
encourage eco- friendly herbicides
Breeding of crops with high levels of minerals, vitamins and proteins is called
somatic hybridization
biofortification
biomagnification
biomagnification
Consider the following statements ( I - IV) about organic farming.
I. Utilises genetically modified crops like Bt cotton
II. Uses only naturally produced inputs like compost.
III. Does not use pesticides and urea
IV. Produces vegetables rich in vitamins and minerals.
(II), (III) and (IV)
(III) and (IV) only
(II) and (III) only
(II) and (III) only
In gymnosperms, the pollen chamber represents
a cell in the pollen grain in which the sperms are formed.
a cavity in the ovule in which pollen grains are stored after pollination
an opening in the megagametophyte through which the pollen tube approaches the egg
an opening in the megagametophyte through which the pollen tube approaches the egg
Bacterial leaf blight of rice is caused by a species of
Xanthomonas
Pseudomonas
Alternaria
Alternaria
Somaclones are obtained by
tissue culture
plant breeding
irradiation
irradiation
Which one of the following pairs is wrongly matched?
Detergents -Lipase
Alcohol- Nitrogenase
Fruit juice - pectinase
Fruit juice - pectinase
