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How does natural selection lead to evolution

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How does natural selection lead to evolution

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Solution

Natural selection leads to evolution through the following steps:

  1. Variation: In any population, there is a natural variation in traits. These traits can be physical, such as size or color, or they can be behavioral, such as hunting skills or social behavior. This variation is caused by mutations in the genetic code.

  2. Overproduction: Most species produce more offspring than can survive to maturity. This leads to a struggle for resources, such as food, water, and shelter.

  3. Survival of the Fittest: The individuals with traits that give them an advantage in their environment are more likely to survive and reproduce. This is known as "survival of the fittest". The advantageous traits may help an individual to find food, avoid predators, or attract mates.

  4. Reproduction: The individuals that survive and reproduce pass on their advantageous traits to their offspring. Over time, these traits become more common in the population.

  5. Speciation: As different traits become more common in different groups within a population, these groups can become so different that they become separate species. This is known as speciation.

Through these steps, natural selection leads to the evolution of species over time.

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