A study was done on a species of flightless bird in the Amazon. Over recent years some of these birds have begun to learn to fly when previously this was impossible. Scientists later discover that a mutation has allowed some of these birds to be able to fly, allowing them extra safety from predators. Given the mutation in this species of bird, would it be considered harmful or beneficial?
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Answer: beneficial

Brad and Henry were two old friends in their 70's. Brad had very high levels of cholesterol, while Henry was healthier and had normal levels of cholesterol. Which friend doesn't take an inhibitor of HMG-CoA reductase?
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Answer: Henry

Uncle Tom and uncle Sam both have high cholesterol. Uncle Tom is on statin drugs and uncle Sam is not. Which uncle doesn't take a drug that works slightly differently in many people?
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Answer:
Sam