Volatile chemical which exist in the gaseous state in sufficient concentration to be lethal for a given pest is called?

Three important law of heredity proposed by Mendel relate to________?

“Economics is the study of causes of material welfare” was defined by________?

A transonic individual has chromosome number________?

What is the effect of application of P2O5 fertilizer to a green manure leguminous crop in the availability of phosphorus to the succeeding crop?

On the basis of yield of cotton per hectare which of the following country occupies second position________?