The body tolerates a wide range of many variables such as blood glucose and sodium plasma levels. Why do you think that is there much less variation tolerated in oxygen saturation? Normal ranges: Glucose 90-130 mg/dL, Plasma-sodium 135 and 145 (mEq/L)
Oxygen 95-100% saturation

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.