Question

Can quality be characteristic feature for which local breeds of cattle are selected for hybridisation

Answer 1

In the contemporary world the provision of food and adequate levels of nutrition for the ever-increasing world population are important economic, social and political problems. Agriculture has been and will remain the principal source of human food. In the years to come it is important not only to increase energy intake but also to provide a balanced diet. Livestock production is one of the most valued components of human diet and the rational use of farm animals is gaining importance.

Answer 2

Answer:

Salient features of hybridisation :

(1) Atomic orbitals of the same atom can take part in hybridisation

(2) Only atomic orbitals and not electrons undergo hybridisation

(3) The atomic orbitals of comparable energies only can undergo hybridisation.

(4) The number of hybrid orbitals formed is equal to the number of hybridising orbitals.

(5) The shape of the hybrid orbitals is different as compared to the shape of hybridising atomic orbitals.

(6) All the hybrid orbitals are equivalent and have the same shape and energy.

(7) Hybrid orbitals orient in space, so as to minimise repulsion between their electrons and have maximum symmetry. Geometry of the molecule is due to the orientation of hybrid orbitals.

(8) The covalent bonds formed by hybrid orbitals is stronger than those by pure atomic orbitals.