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:

F.Miescher was a  Swiss physician and a Biologist.He was 41 years old.With his experimental processes he was able to isolate many compounds which contains phosphate  from the  nuclei of  white blood cells.He called these chemicals nuclein.(Nuclei acids) This took place in a Felix-Hope seyler's Lab, In Germany.The discovery was in 1869.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

i think the miocene epoch spans the time from 23 million to 12 million years ago.