Which of the following is real secretory product of the honey bee?
Bee wax is the real secretory product of the honey bee. Honey is collected from flowers and stored in the hive, it is not secreted by the bee.
Crop plants grown in monoculture are
Crop plants grown in monoculture are highly prone to pests.
Pure lines refer to ____.
Pure lines refer to animals which are homozygous in nature.
Which of the following is not correctly matched with its variety?
Pusa Sadabahar is a variety of chilli while Pusa Komal is a variety of cowpea.
Pomato has been developed from ____.
Pomato is a hybrid of Potato and Tomato. However this plant was not able to survive under field conditions.
Which of the following is a bacterial disease ____.
Black rot of crucifers is a bacterial disease. Mosaics are caused by virus while late blight of Potato is caused by a fungus.
The best method used to overcome inbreeding depression is ____.
The best method used to overcome inbreeding depression is Outcrossing. Inbreeding depression is caused due to continuous inbreeding which leads to decreased fertility and productivity. The best method to overcome this problem is outcrossing in which animals of the same breed, but which have no common ancestors on either side of their pedigree up to 4-6 generations are crossed.
Sonalika and Jaya are HYV's of ____.
Sonalika is a HYV of Wheat and Jaya is a HYV (high yielding variety) of Rice.
In order to obtain virus-free plants through tissue culture the best method is
Meristem culture is done for the development of virus free plants. Meristematic tissue cell can be taken either from shoot or root tip.
Spirulina belongs to ____.
Spirulina belongs to Blue green algae.
In tissue culture medium, the embryoids formed from pollen grains is due to
Cellular totipotency is the ability, shown by many living cells to form all types of tissue that constitute the mature organisms.
Spirulina is an example of ____.
Spirulina is a single cell protein.
Mule is a product of
Mule is an inter specific hybrid between female horse and male donkey. Mule is sterile hybrid.
The birds that are reared for eggs and meat are respestively called ____.
The birds that are reared for eggs and meat are respectively called Layers and Broilers.
Three crops that contribute maximum to global food grain production are
Three crops that contribute maximum to global food grain production are wheat, rice and maize, which belong to the family Poaceae (Graminae).
Reproducing new plants by cells instead of seeds is called ____.
Reproducing new plants by cells instead of seeds is called Tissue culture.
What is the best pH of soil for cultivation of plants?
The best pH of soil for cultivation of plants is 6.5 - 7.5.
Hinny is produced by ____.
Hinny is produced by Interspecific hybridisation. The process by which male and female animals of two different species are crossed is called interspecific hybridisation. Hinny is a interspecific hybrid between a male horse and a female donkey.
Golden rice has ____.
Golden rice is a new variety of rice which has very high Vitamin A content.
Which of the following is not used for crop improvement?
Introduction, hybridization and mutations are the methods of plant breeding.
Cellular totipotency is demonstrated by
Cellular totipotency is exhibited only by plant cells wherein the plant cells retain the ability to deactivate and form the new dividing cells
Which one of the following is an exotic Indian fish?
Catla catla and Labeo rohita are the two India major carps whereas Heteropneustes is a catfish. Cyprinus is the exotic breed.
Draught breeds include ____.
Draught animals are those which are the 'beasts of burden'and do work for us on the farm like Ox .
Classical plant breeding involves ____.
Classical plant breeding involves hydridisation of pure lines followed by artificial selection.
Maize plants show resistance to stem borers because of ____.
Maize plants show resistance to stem borers (pest) because of low nitrogen content and high aspartic acid content.
The development of drones in the honey bee colony is an example of ____.
Drones in the honey bee colony are developed from unfertilised eggs by the process of parthenogenesis.
A sudden change in the base sequence of genes is called ____.
A sudden change in the base sequence of genes is called mutation.
Silk worm is a
Silk is produced by silk worm insect called as silk moth.
Haploid plants are preferred over diploids for mutation study because in haploids
Mutations are generally recessive so they are expressed in their heterozygous condition. If plant is haploid then mutation can express themselves.
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