Select each correct answer. More than one answer may be correct. Which of the following are main tenets of Darwin's theory of natural selection? 1. Traits acquired during an individual's lifetime are heritable. 2. Individuals compete for resources. The traits within a population vary and are heritable. Individuals can produce more offspring than can survive. Individuals most adapted to their environments have a better chance of surviving to reproduce.

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Pre-Darwinian Concepts