Which of the following does the work of separator

DNA coiled twice around the histone forms

Given below are two statement, one is labelled as Assertion A and the other is labelled as Reason R

Most damaging form of soil erosion is

The measurement of drought is expressed in 

Nutrient that is deficient in arid soil?

Sprouting of Onion and Potatoes in storage can be avoided by using this as pre-harvesting treatment 

Enzyme that fixes CO₂  in C4 plants at Iow concentrations?

The Green Revolution in India achieved its greatest success in the production of which combination of crops?

Which of the following is incorrectly matched?