Which of these is true of a cell membrane? A: A cell membrane has a property called selective judgment. B: A cell membrane blocks all particles from coming through. C: A cell membrane is a protective structure that encloses a cell. D: all of the above

Isotopes of the same element have differ in their

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.

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.