In nature, organisms tend to overproduce. In a given population, there is always variations among individuals. During competition, organisms that have favorable traits for this task will survive and are said to be selected. These organisms will reproduce and pass on those traits to their offspring. Thus, the frequency of organisms with those traits will increase. Note: only the offspring or organisms that survive will eventually evolve. To learn more, go to the following link.
Darwin's Proposed Explanation of Natural Selection
- In Nature, organisms produce more offspring than can survive.
- In any population, individuals have variations.
- Individuals with favorable variations survive, reproduce and pass on those traits
- Overtime, offspring with certain variations make up most of the population and may look entirely different from their ancestors.
To check your understanding of Darwin's explanation, go to this link and problem #12
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