According to the discovery made in $1980's$. $RNA$ can act like enzyme to assemble new $RNA$ molecules on $RNA$ template. Which of the following statements is not proved by this theory?
Coacervates may not have been the first step in the evolution of life
Perhaps the first macromolecule was $RNA$
Coacervates were the basis for the first cell
After formation of $RNA$, stability of molecule improved by surrounding $RNA$ within a coacervate
Which one of the following is direct ancestor of modern man
Australopithecus had a cranial capacity