The term 'blue revolution' refers to the remarkable emergence of aquaculture as an important and highly productive agricultural activity. It has a vision to achieve economic prosperity of the country and the fishers and fish farmers as well as contribute towards food and nutritional security through full potential utilization of water resources for fisheries development in a sustainable manner, keeping in view the bio-security and environmental concerns. It brings a high  aquaculture in India. Aquaculture refers to all forms of active culturing of aquatic animals and plants, occurring in marine, brackish or fresh waters.

The terminal or intercalary buds having apical meristems are the best-suited parts of plant for making virus-free plants because they are resistant and virus-free even though plants are affected. 

(i) A- The home induces follicular maturation and superovulation, i.e. production of 6-8 eggs.
B- They are transferred to surrogate mother.
(ii) The technology is called MOET. It is used to increase the herd size by breeding high milk yielding breeds of females with high quality meat yielding bulls.

In animal husbandry, pure lines are produced by inbreeding of animals of same breed for 4 to 6 generations. It involves a number of steps like:
(i) Selection of superior male and female animals of same breed.
(ii) Selected animals are allowed to mate in pairs to produce progeny.
(iii) Superior animals are selected from progeny and process repeated for 4 to 6 generations.

Utility of such plants is due to:
(i) Rapid multiplication rate
(ii) To get uniformity in crop yield.
(iii) A better variety once developed, continues to remain with same characters without loosing vigour.

'Stress' for plants refers to unfavourable environment condition that reduces growth and yield of plants. Plants encounter two types of stress.
(a) Drought, water-logging, snowing, high-temperature, salinity (Abiotic Stress Factors). Stomata get closed which leads to reduction in photosynthesis and plant yield.
(b) Animals and Man (Biotic Stress).

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.

Aquaculture is the process of production of aquatic plants and animals, both of freshwater and marine.(Fish, lobsters,crabs)