What was Friedrich Miescher's contribution to the discovery of the genetic code? He created the first photograph of the structure of DNA. He discovered how the DNA bases pair together. He created the first accurate model of DNA's structure. He extracted and observed DNA from white blood cells.

He extracted and observed DNA from white blood cells.

Explanation:

Friedrich Miescher, who is a Swedish Botanist, is the scientist who isolated for the first time. In 1869, Miescher isolated a chemical he called NUCLEIN, which is called Nucleic acid now.

He discovered this so called "NUCLEIN" substance from the nuclei of white blood cells. Nucleic acids are the DNA and RNA we know today, hence, Miescher's discovery was significant to the genetic code as he even agitated for the inclusion of his discovery into inheritance.

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:

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .