Which of the following had great influence on Drawing during during formulation of his theory of natural selection________?

A water flow available in the drains without irrigation season i.e.flow of sanitary sewage is called________?

Breeder parent should be given ration ________?

A curve showing the distribution of income in an economy________?

On the basis of yield of cotton per hectare which of the following country occupies first position?

haploids are better for mutation studies because in them all the mutations whether recessive or dominant are expressed as________?