Theory of inheritance of acquired characters was putforth by
Lamarck
Weismann
Galton
de Vries
Write short note on Lamarckism.
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.
When we say ''survival of the fittest'', does it mean that $(a)$ those which are fit only survive, or $(b)$ those that survive are called fit ? Comment.
What are the key concepts in the evolution theory of Darwin ?