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. What role does cellular respiration play in the carbon cycle?

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.