0. Adaptation, - A certain variation or trait that allows the individual to survive better than other individuals.
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1. Descent with modification, - Over time, natural selection will result in species with traits that are beneficial for survival within a certain environment.
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2. Survival of the fittest -, Only the organisms that are better suited to survive in their environment will live enough to reproduce and pass their traits.
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3. Overproduction ,- Organisms can produce more offspring than can actually survive. Therefore, they must compete against each other for resources.