Look back at your answer to the previous question for tube C. Revise your answer to explain why there are more organisms at the top of tube C than at the bottom.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Which best describes carbon dioxide’s path out of the body

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.