The building block (monomers) of dna are?

amber has allowed scientists to study dna that has been preserved over millions of years.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

and after water is usually warmed by the sun the water temperature raises and then evaporates .