Question

Key concept on which Darwinian theory of evolution is based are

• A. Branching descent and natural selection
• B. Saltation and mutation
• C. Genetic drift and variations
• D. Population statistics and physical fitness of of organism

Answer 1

The correct option is A Branching descent and natural selection

• Key concept on which Darwinian theory of evolution is based are Branching descent and natural selection.
  
• Natural selection may be defined as the process by which the organisms which are better adaptive to a particular kind of environment tends to survive, leading in the elimination of the organism less adaptive to that environment.
  
• Branching descent may be defined as the process by which new species originate from a single common descendant.
  

So, the correct option is 'Branching descent and natural selection'.