NEET BIOLOGY

Detailed explanation-1: -Darwin referred to this as survival of the fittest. Over time, it results in changes in the inherited characteristics of a population because organisms with adaptations that make them fit for their environment will survive and reproduce better than those without favorable traits.

Detailed explanation-2: -In the first four editions of On the Origin of Species, Darwin had used the phrase “natural selection". In Chapter 4 of the 5th edition of The Origin published in 1869, Darwin implies again the synonym: “Natural Selection, or the Survival of the Fittest".

Detailed explanation-3: -Social Darwinists believe in “survival of the fittest”-the idea that certain people become powerful in society because they are innately better. Social Darwinism has been used to justify imperialism, racism, eugenics and social inequality at various times over the past century and a half.

Detailed explanation-4: -Darwin introduced the phrase in a few places in his works from 5th edition of Origin in 1869. However, he never abandoned the term ‘natural selection’ and only saw ‘survival of the fittest’ as a synonym or auxiliary phrase to help make his meaning clear to his readers.

Detailed explanation-5: -Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.