Abstract

The idea that all forms of life are connected via a common ancestor and share shared ancestry is referred to as the theory of evolution. According to this theory, the birds and the bananas, the fishes and the flowers are all linked to one another. The overarching framework of Darwin's theory presupposes the emergence of life from non-life and places an emphasis on a completely spontaneous and undirected "descent with modification." To put it another way, more complex species descended from simpler forebears during the course of spontaneous, unguided evolution. The process that we refer to as "natural selection" may be summarized as follows: when random genetic mutations arise within the genetic code of an organism, those mutations that are advantageous to the organism's survival are retained because of the role they play. These advantageous mutations are handed down to subsequent generations of organisms. Mutations that are advantageous tend to accumulate over time, and as a consequence, the organism ends up being completely different (not just a variation of the original, but an entirely different creature).

Keywords

• Evolution,
• Theory,
• Associated

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