ACT Science Practice 1
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1.In which of Studies 1 and 2 did some of the fruit flies live for more than 75 days, and what diet were those fruit flies fed? *
1 point
2. During Studies 1 and 2, why did the size of the fruit fly population in each tube decrease rather than increase?
1 point
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3. Study 1 differed from Study 2 in which of the following ways?
1 point
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4. Suppose that an additional trial in Study 3 had been performed using a 12% SY medium (a diet with 12% sugar and 12% killed yeast). The average lifespan of the Strain X fruit flies in this trial would most likely have been:
1 point
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5. The researchers had predicted that decreasing a fruit fly’s ability to detect odors would increase its lifespan. Are the results of Study 3 consistent with this prediction?
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6. Suppose the researchers wanted to determine whether a defect in the ability to detect odors would change the life span of fruit flies fed 15% SY medium when live yeast is added to the diet or when additional odors from live yeast are added to the diet. Which of the following experiments should be performed?
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