The Miller experiment proves .......

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.

What does '$b$' represent in the given diagram?

The theory of "continental drift" was originally proposed by

Which of the following is $NOT$ a characteristic of the 'protobionts' as hypothesized in the abiogenic origin of life?

Which theory argues that life on Earth came from outer space?