Natural selection is popularly known as ‘selection of the fittest’. It means that conditions in the environment of a species put pressure on it and the individuals that are best suited to these conditions are most likely to survive, mate and pass on their DNA to their young. Any organisms less capable of surviving will be less likely to survive and so have less chance of passing on their DNA. This is evolution!
Natural selection is the process by which certain heritable traits—those that make it more likely for an organism to survive and successfully reproduce —become more common in a population over successive generations. It is a key mechanism of evolution.
I’m not really and evolutionary biologist and I’m sure this can be answered better by the scientists in the Evolution Zone, Why don’t you try in there?
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