Lauren Wells A. Natural selection is the different successes in reproduction of individuals that vary in heritable traits. Darwin’s theory of evolution included three inferences and five observations. These inferences and observations support Darwin’s proposal for…. One observation said that if individuals who are born reproduce successfully than population sizes with increase. Another observation said seasonal fluctuations can change a population size but they normally stay constant. When resources are limited, production of more individuals than resources leads to a struggle for existence in a population. Members of a population vary in their characteristics; much of the variation is heritable. Survival of the individuals depends in part on inheritable traits. The higher the fitness the more likely for offspring to survive than individuals of lover fitness. Natural selection and the ability for individuals to survive and reproduce leads to a gradual change over many generations in favorable conditions. B. Speciation and Isolation
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This note was uploaded on 10/31/2011 for the course BIO 102 taught by Professor Robinson during the Spring '09 term at UPenn.