Question

the video discusses the miller experiment, which produced amino acids from simple gases. what limitation of this experiment must scientists consider today?
amino acids cannot form without living cells
it relied on solar radiation rather than lightning
the early earths atmosphere may have been different from the gases used
the experiment failed to produce organic molecules

Explanation:

The Miller - Urey experiment used a mixture of gases (methane, ammonia, hydrogen, and water vapor) to simulate the early Earth's atmosphere. However, modern research suggests that the early Earth's atmosphere composition might have been different. For example, there could have been less methane and ammonia. This difference in the assumed atmospheric composition is a key limitation.
Amino acids can form without living cells (as shown by the Miller - Urey experiment itself). The experiment used electrical sparks (to simulate lightning), not solar radiation. And the experiment did produce organic molecules (amino acids).

Answer:

The early Earth's atmosphere may have been different from the gases used.