In which various fields, biotechnology has been useful?

Explanation

Biotechnology has been used in the following fields :
a. Agriculture: This includes production of cash crops, improvement in varieties of cash crops, increase in abilities of plants to withstand environmental stresses, etc.
b. Medical science: Early diagnosis of congenital diseases, organ transplantation, cancer research, production of artificial skin, cartilage, etc. in laboratories.
c. Pharmaceutics: Development of drugs, vaccines, etc., for treatment of a variety of human and animal diseases.
d. . Environmental science: Environment protection which includes development of newer techniques for pollution control and sewage treatment