Methane gas is a carbon-based gas that is formed when living organisms decompose. Scientists have measured large amounts of methane gas trapped under the polar ice caps. Predict what might happen to global atmospheric carbon levels if the polar ice caps were to melt. Explain your answer.

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

If the rna molecule in a human has the nucleotide sequence of guu, this would the amino acid valine would be needed to make the protein. how would this cha process was occurring in a mushroom?

Describe characteristics of a good respitory surface