Origin of different types of beaks occur due to
Branching descent is one of the key concepts of
The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.
What are the key concepts in the evolution theory of Darwin ?
Comment on the statement that ''evolution and natural selection are end result or consequence of some other processes but themselves are not processes''.