Battling bacterial evolution: The work of Carl Bergstrom

• Evolution results from selection acting upon genetic variation within a population.
• Traits that are advantageous often persist in a population.
• The process by which advantageous traits are maintained and disadvantageous traits are weeded out of a population is known as natural selection.
• Inherited characteristics affect the likelihood of an organism's survival and reproduction.
• Natural selection acts on individuals and populations in a nonrandom way.
• Evolution acts on what exists.
• Populations evolve.
• The proportion of individuals with advantageous characteristics may increase due to their increased likelihood of surviving and reproducing.
• Scientists pose, test, and revise multiple hypotheses to explain what they observe.
• Science does not prove or conclude; science is always a work in progress.
• Science corrects itself.
• Science is a human endeavor.
• As with other scientific disciplines, evolutionary biology has applications that factor into everyday life.

• Nature of Science
• Natural Selection
• Relevance