Which scientists proposed that the first life must have come from pre-existing non-living organic molecules?

Who first conducted an experiment on evolution to prove the biochemical origin of life?

Explain the origin of the Earth and the sequential changes that occurred on it.

Miller and Urey performed an experiment to prove the origin of life. Along with $NH_3$ and $H_2$ gases,they used .....

Describe Miller's experiment with a diagram.

Read the following statements and find out the correct ones:
$A.$ Spontaneous generation theory was approved once and for all.
$B.$ Pasteur showed that in pre-sterilized flasks,life did not come from killed yeast.
$C.$ Oparin observed the formation of amino acids by creating electric discharge in a closed flask.
$D.$ Life appeared $500$ million years before the formation of the earth.