(a) State the objective of animals breeding.
(b) List the importance and limitations of inbreeding. How can the limitation be overcome ?
(c ) Give example of a new breed each of cattle and poultry .

State the disadvantage of inbreeding among cattle. How it can be overcome?

(a) Explain how to overcome inbreeding depression in cattle. (b) List three advantages of inbreeding in cattle. (c) Name an improved breed of cattle.

(a) What is plant breeding? List the two steps the classical plant breeding involves. (b) How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped. (c) How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.

(a) Write the two limitations of traditional breeding technique that led to promotion of micro propagation. (b) Mention of micro propagation. (c) Give two examples where it is commercially adopted.

(a) In reference to Freundlich adorption isotherm write the expression for adsorption of gases on solids in the form of an equation. (b) Write an important characteristic of lyophilic solc. (c) Based on type of particles of dispersed phase, give one example each of associated colloid and multimolecular colloid.

(a) Explain any two physical properties of ionic compounds giving reason. (b) List any two metals found in free state in earth's crust. Where are they located in activity series ? (c) Metals towards the top of the activity series can not be obtained from their compounds by reducing with carbon. Why?

(a) Write the function of each of the following parts of human eye : cornea, iris, crystalline lens, ciliary muscles (b) Millions of people of the developing countries of the world are suffering from corneal blindness. These persons can be cured by replacing the defective cornea with the cornea of a donated eye. A charitable socity of your city has organised a compaign in your neighbourhood in order to create awareness about this fact. If you are asked to participate in this mission how would you contribute in this noble cause ? (i) State the objective of organising such compaigns. (ii) List two arguments which you would give to motivate the people to donate their eyes after death. (iii) List two values which are developed in the persons who actively participate and contribute in such programmes.

The teachers of Geeta's school took the students on a study tirp to a power generating station, loactad nearly 200km away form the city.The teacher explained that electrical energy is transmitted over such a long distance to their city, in the form of alternating current (ac) raised to a high voltage. At the receiving end is the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Geeta listened to the teacher and asked question about how the ac is converted to a higher or lower voltage. (a) Name th device used to change the alternating to a higher or lower value. State one cause for power dissipation in this device. (b) Explain with an example, how power loss is reduced if the energy is transmitted over long distance as an alternating current rather than a direct current, (c) Write two values each shown by the teachers and Geeta.