Ascientist is trying to determine whether the use of hair dye contributes to brain cancer. for his study, he compares the medical records of subjects that have been diagnosed with brain cancer to the records of healthy subjects. what is the most significant weakness in this type of study? a. the test groups must be unusually large to generate significant data. b. the relationship between the hair dye and the cancer is difficult to determine. c. this type of study is expensive and the data is difficult to analyze. d. this type of study must rely on medical records, which are often inaccurate or incomplete.
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Biology, 22.06.2019 03:40, lashaunahard
20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.
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Biology, 22.06.2019 11:30, gymnastcaitlyn1
There are multiple lines of evidence that provide support for common ancestry and evolution. write 3-4 paragraphs describing at least three of them in detail. provide at least one example for each line of evidence.
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Biology, 22.06.2019 11:30, pacoburden02
Explain the process that creates the heat of the sun?
Answers: 2
Ascientist is trying to determine whether the use of hair dye contributes to brain cancer. for his s...
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