Many scientific discoveries have contributed to the explanation of how life began on Earth. Which of the following was NOT used to develop this scientific theory? A. Scientists supported Lynn Margulis' theory that eukaryotic organelles such as mitochondria and chloroplasts originated as prokaryotes that lived inside other, larger prokaryotic cells.

B. Louis Pasteur disproved spontaneous generation by showing that bacteria will not grow on meat in a sterilized environment.

C. Oparin's "primordial soup" theory was tested by Miller and Urey by passing sparks through a mixture of gases to represent lightning and within a week, several simple organic molecules had formed.

D. Darwin's argument that vestigial structures are evidence that evolution has occurred.