Question

Darwin in his natural selection theory did not believe in one of the following in organic evolution?

• A. Discontinuous variations
  
• B. Survival of the fittest
• C. Struggle for existence
• D. Both B and C

Answer 1

The correct option is A Discontinuous variations

• "Survival of the fittest" was mainly used by Charles Darwin which stated that organism struggles to survive in the environment. The species which is most fit and is able to tolerate the harsh conditions is able to survive for a longer duration.
• This supports the fact that evolution is dependent on natural selection. As favourable variations are transmitted from generation to generation, successive generations become better adapted to the environment, moreover, new adaptations may arise due to changing environment.
• In this way, the adaptive traits preserved by natural selection will gradually change the characteristics of a species.

So, the correct answer is option A.