Even though India is an agricultural country it is not possible to plough the land with the help of tractors as the holdings are very small in size. So ploughing is done by plough and yoke. Bullock-carts are still used for transportation.
Biology provides the greatest scope in every human enterprise. Many medicines are obtained from plants e.g. quinine from cinchona, nuxvomica from strychnos nuxvomica, penicillin from a fungus, Pencillium. Vaccines for poliomyelitis, mumps, hepatitis, rabies, measeles are developed in animali body. Antivenom is prepared from animal serum.