Oxygen cycling in Earth’s hydrosphere is often found in which of these forms? Choose the correct answer. -nitrogen oxide, oxygen, ozone
-bicarbonate, dissolved oxygen, water
-carbohydrates, carbon dioxide, ozone
-dissolved carbon dioxide, nitrogen oxide gas

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.