True or false? the framingham study and the two lung cancer studies are examples of retrospective cohort studies that followed large numbers of people over extended periods of time.

False

The Framingham study and the two lung cancer studies are examples of prospective cohort. Retrospective cohort studies ask people to recall the past while prospective cohort will follow them over the time. The study start from 1948 and still ongoing until now. If the study is retrospective, it should be finished long ago.

the answer is b.) hydrogen bonds between bases.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.