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Which of the following is/are true of tests used for screening for disease?a. One positive screening test is not usually sufficient to diagnose a disease. b. Changes within the range of normal can be due to a disease. c. The range of normal is not the same for all groups or populations. d. All of these are correct\
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Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
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Biology, 22.06.2019 15:30
Wich is not standing in the way of astronomers getting a good view of different star
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Which of the following is/are true of tests used for screening for disease?a. One positive screening...
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