For a long time,it was believed that life originated from decaying and rotting matter like straw,mud,etc. This was the theory of:

In their experiment,Urey and Miller mixed $CH_4, H_2, NH_3$,and water vapor in a closed flask and provided electrical energy at a temperature of ........ to simulate primitive atmospheric conditions. (in $^{\circ} C$)

Which was absent in the atmosphere at the time of origin of life?

Coacervates are:

Preformation theory concerning the transmission of characters was given by

According to Oparin,which of the following was $NOT$ present in the primitive atmosphere of the Earth?