Question

Explain Darwin's theory of natural selection.

Answer 1

Darwin's theory of natural selection has the following postulates:

1. All organisms have a high capacity to reproduce.
2. Reproduction results in variations.
3. High reproduction rate puts a pressure on the environmental resources.
4. Limited availability of the resources will cause the species to struggle for existence.
5. The organisms having the best of variations that can allow them to survive in the changing environmental conditions will reproduce and become dominant species.
6. Such organisms are said to have undergone natural selection.
7. Thus, natural selection of organisms occurs due to variations providing survival advantage and fitness to reproduce.