Question

the miller-urey experiment showed that, under certain compounds present on earth billions of years ago and left little doubt about the mechanism of early life. the experiment proved that methane and ammonia will always give rise to organic molecules in any circumstance. scientists think that life could not have developed through natural chemical and physical processes. scientists think it is possible that organic compounds formed from the inorganic compounds present on earth billions of years ago

Explanation:

The Miller - Urey experiment simulated conditions thought to be present on early Earth. It showed that simple inorganic compounds (like those in the experiment) could form organic compounds. It did not prove a definite mechanism for early life (so the first option is wrong as it says "left little doubt about the mechanism"), nor did it say methane and ammonia always give organic molecules in any circumstance (second option wrong). It also supported the idea that life could develop through natural chemical and physical processes (so third option wrong). The experiment provided evidence that organic compounds could form from inorganic ones under early Earth - like conditions.

Answer:

Scientists think it is possible that organic compounds formed from the inorganic compounds present on Earth billions of years ago.