In which disorder does a person find it difficult to fall asleep or stay asleep for a long time?

To be or not to be that is da question

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?