Yes. Dedifferentiation is key to development of cell division and growth of plant mass callus. Callus can be subdivided at regular intervals and the subcultures allowed differentiate and form plantlets.

(i) High yield
(ii) Disease and pest resistance
(iii) Desirable quality
(iv) Droght resistance

1. Aplical meristem is best used for production of virus resistant plants.
2. Even in a plant infected by virus, the aplical meristem is free of virus; it can be easily removed and grown in vitro to obtain virus -free plants.

During flowering seasons, the honey-bees visit a number of flowers in search of edible pollen and nectar; since they collect nectar from a large number of flowers, honey collection improves during flowers seasons.

(a) Himgiri variety of Wheat.
(b) Pusa Swarnim variety of Brassica
(c) Pusa Shubhra variety of Cauliflower.
(d) Pusa Komal variety of Cowpea.
(e) Pusa Sadabahar variety of Chili.

Artificial insemination is the process in which the semen collected from a superior male animal is injected into the reproductive tract of the selected female, using surgical instruments.
Advantages:
(i) Semen can be used immediately or stored/frozen and used at a later date, when the female is in the right reproductive phase.
(il) Semen can be transported in the frozen form to distant places, where the selected female animals are present.
(iii) Semen from one selected male animal can be used on a number of female animals. 

Blue revolution is a movement lanched to increase the production of fish.Freshwater fish: catla and Rohu. Marine water fish: Helsa and sardines.

(a) Multiple ovulation Embryo Transfer , (MOET) technology
(b) Steps in MOET technology:
A cow is administered hormones with FSH-like activity to induce follicular maturation and superovulation, i.e. instead of one egg, 6-8 eggs are produced per cycle.
The animal is either mated with an elite bull or artificially inseminated.
The fertilised eggs are recovered at the 8-32 celled stages, nonsurgically.
They are then transferred to surrogate mothers.
The genetic mother is available for and her round of superovulation.

Successful bee keeping
It requires the following considerations:
(i) Knowledge of the nature and habits of bees.
(ii) Selection of suitable location of keeping beehives.
(iii) Catching and hiving of swarms.
(iv) Management of beehives at different seasons.
(v) Handling and collection of honey and beewax.

Since milk yield depends primarily on the quality of the breed, selection of a suitable breed is very important; the breed should be high-yielding under the given climatic condition and resistant to diseases.
For the yield potential to be realised, the animals have to be well looked after;
Following are the practices needed for that:
(i) They have to be housed well, in proper, well-ventilated sheds.
(ii) They should have sufficient water.
(iii) The feeding should be carried out in a scientific manner with special emphasis on quality and quantity of fodder.
(iv) Cleanliness and hygiene of both the cattle and the handlers are of great importance.
(v) The cattle should be disease free, i.e. immunisation for various diseases should be carried out; regular medical check-up by a veterinary doctor would be mandatory.
The animal has to be mated with the elite bull selected; the progeny individuals must be evaluated and superior males and females must be identified for further mating.