Question

What is the most important force of evolution?

Answer 1

Evolution:

1. The change in the heritable traits of a species over many successive generations is known as evolution.
2. There are four forces through which evolution takes place namely: mutation, genetic drift, gene flow, and natural selection.
3. The mutation is the change in the DNA sequence of the gene whereas gene flow is the flow of alleles in and out of a population due to the migration of individuals or the gametes.
4. Genetic drift is simply the effect of chance and is important in smaller populations as it has stronger effects on them. It is the evolutionary change in frequencies of alleles of a population due to chance.

Natural selection :

1. Natural selection is the most important force of evolution where the organisms capable to survive and reproduce with changing environmental conditions are selected by the nature but the incapable ones are eliminated.