What Is Life? 2nd Edition by Jay Phelan

Exercise 2

In a set of classic experiments performed in the early 1950s, Urey and Miller subjected an experimental system composed of H2, CH₄ (methane), and NH3 (ammonia) to electrical sparks. A few days later, they found ______ in their system.
A) amino acids
B) DNA
C) microspheres
D) cells
E) RNA