In a famous experiment, Miller and Urey discovered that organic molecules could form under the conditions believed to be characteristic of early Earth. About 50 years later, a student of Miller's reanalyzed a sample from the experiment. Which of the following best describes what resulted from this? A) More complex organic macromolecules were found, further supporting the idea that evolution of life occurs over a long period of time.
B) More organic compounds were found and analyzed, and results suggest that abiotic synthesis of organic compounds took place near volcanoes.
C) The sample contained aerobic microorganisms, supporting the idea that the amount of atmospheric oxygen on Earth has increased over time.
D) The sample contained only inorganic molecules, suggesting that the original sample either decomposed over time or was originally contaminated.