Darwin explained origin of species through :

Darwin wrote Origin of Species in

How do homologous organs act as an evidence of organic evolution? Explain the orgin of species in the light of Darwin.

Darwine wrote 'Origin of Species' in

What according to Darwin, led to the origin of new species ?

How does Mutation theory of Dev. Vries differ from Lamarck and Darwin's view in the origin of new species.

What are the drawbacks in the Darwin's theory of "Origin of species " ?