EvolutionPrinciples160-page10 - • Selection favors...

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Principles of Evolution - 10 Guppies raised in environments without predators have more colorful (to our eyes) patterns than guppies raised with in environments with visual predators. Antibiotic resistance in bacteria is another good example of contemporary evolution in action. Virus evolution, including the evolution of HIV is also studied. It's important to always remember the following: Variations that are subject to selection must either exist within the population prior to the selection "pressure" or arise by mutation
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Unformatted text preview: • Selection favors individuals adapted to a specific environment. A changed environment may favor the same individuals. We shall discuss selection as a mechanism for the process of evolution in more detail a bit later. It took a physician and a mathematician to get us started of looking for the agents or mechanisms that could promote change in populations by acting on variations in gene frequencies....
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