According to the Neo-Darwinian theory, which of the following is responsible for the origin of new species?

The idea of natural selection as the fundamental process of evolutionary change was reached

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

Natural Selection Theory of Darwin is objected to, because it

In the developmental history of mammalian heart, it is observed that it passes through a two-chambered fish-like heart, three-chambered frog-like heart and finally four-chambered stage. To which hypothesis can this above cited statement be approximated