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Lecture%201%20answers - Answers to study questions Lecture...

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Answers to study questions Lecture 1, Evolution of antibiotic resistance 1. How would an evolutionary biologist define the term “adaptation”? Answer: An adaptation is any trait (structural, physiological, or behavioral) that enhances the reproductive success of an organism in its environment. 2. What three conditions are necessary and sufficient for the process of evolution by natural selection? Answer: 1. Phenotypic variation. There must be variation in the traits (structural, physiological, or behavioral) expressed within a population of the focal organism. 2. Inheritance. The variation in the phenotype must be passed on from parents to offspring, such that offspring resemble their parents. (Note: the resemblance need not be perfect.) 3. Differential reproductive success . Certain heritable variants must have a greater mean expectation of reproductive success than other heritable variants. 3. Which of the following terms is NOT one of the hierarchical levels of biological organization: a. cell b. tissue c. organ d. digestion
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