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, 21.06.2019 19:10
Which statement about inheritance is true? o girls get most of their traits from their moms, boys get most of their traits from their dads. o male offspring will always have an x-linked genetic disease if the mom is a carrier o fathers always determine the gender of the offspring in humans. o males never have y chromosomes.
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Biology, 22.06.2019 03:00
Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus
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Biology, 22.06.2019 08:00
Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.
Answers: 1
Ascientist is trying to determine whether the use of hair dye contributes to brain cancer. for his s...
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