ASAP
Gas chromatography is most effective with what type of substances?
A) blood
B) fibers
C) petroleum
D) soil

Solutions to environmental problems in europe must

Explain how organisms could be harmed by high levels of salt from roadways?

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.