Which industry is often referred to as the backbone of modern industry and why?

This statement is quite correct. Modern farming methods require chemical fertilisers, pesticides and modern farm equipments. All of these are manufactured in industry.

Modern Periodic Law states that properties of elements are a periodic function of their atomic number.  In Modern Periodic Table there are18 groups and 7 periods.

Iron and steel industry is the basic industry as : (i) All the other industries depend on it for their machinery. (ii) Steel is needed to manufacture a variety of engineering goods. (iii)...

(b) : Secondary structure of proteins is mainly of two types.  (i) α-helix: This structure is formed when the chain of α-amino acid coils as a right handed screw (called ahelix)...

(d) First round table conference was initially between the British and the Indian as equals. The INC did not participated in the first and third conference.

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(i) Cotton textile industry contributes 14 percent of the total industrial production. (ii) It provides employment to 35 million persons directly - the second largest after agriculture. (iii) It earns foreign exchange...

Iron and steel industry is the basic industry as: (i) All the other industries depend on it for their machinery. (ii) Steel is needed to manufacture a variety of engineering goods. (iii) It...

The textile industry occupies a unique position in Indian economy, because it contributes: (i) Significantly to industrial production (14 percent). (ii) It generates employment (35 million persons directly). (iii) Earns foreign exchange (about...