Which of the following are the two key concepts of Darwinian theory of evolution? (A) Genetic drift and mutation (B) Adaptive radiation and homology (C) Mutation and natural selection (D) Branching descent and natural selection

Branching descent and natural selection

According to Darwin’s theory of evolution, nature selects the most suitable. Fitness is based on the traits that are inherited. Hence, there must be a genetic basis for getting selected and to evolve. Some organisms are best able to live in an otherwise hostile climate. Adaptive capability is inherited. It has a genetic basis. Fitness is the end product of the desire to adapt and to be selected by nature. Therefore, branching descent and natural selection are the two main principles of Darwin’s theory of evolution.

So, the correct option is (D)

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