In 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
B.
crossing of two inbred parental lines
Hybrid varieties were first developed in maize, which is a cross-pollinated crop. In such crops, the parents of hybrid varieties are, ordinarily, inbred lines. A inbred line is a nearly homozygous line produced by continuous inbreeding in a cross-pollinated crop and is maintained by strict inbreeding. In maize, hybrid vigour or heterosis is exploited by crossing of two inbred parental lines.
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
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
Which one of the following is a viral disease of poultry?
Salmonellosis
Coryza
New castle disease
New castle disease
Which one of the following pairs is mismatched?
Pila globosa - pearl
Apis indica - honey
kenia lacca - lac
kenia lacca - lac
