The swan-necked flask experiment proved:

According to the theory of chemical evolution (often discussed in the context of the origin of life), which of the following represents a logical sequence of the formation of complex molecules?

Which of the following amino acids was not found to be synthesized in Miller's experiment?

Who conducted experiments on evolution to prove that life originated from biochemicals for the first time?

Match the following columns:

Column-$I$	Column-$II$
$(X)$ Earth	$(1)$ $20$ billion years
$(Y)$ Universe	$(2)$ $4.5$ billion years
$(Z)$ Non-cellular life	$(3)$ $3.0$ billion years

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