The most important condition for the origin of life is the presence of

The proponent of the theory of spontaneous generation was

The primitive environment was reducing because in it

Which gases were taken in the closed flask in $S$. $L$. Miller's experiment?

What were the contributions of the scientists Louis Pasteur $(1860)$,Oparin,and Haldane to the study of the origin of life?

Describe Miller's experiment with a diagram.