How is the frog's respiratory system different from humans?

Which description provides the best objective summary of the article in the passage?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

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.