Question

Draw well labelled diagram of Miller's experiment.

Hint:

Miller's experiment demonstrated that under simulated primitive Earth conditions, organic molecules essential for life can be formed, supporting theories of abiogenesis.

Answer 1

Step 1: Understanding Miller's Experiment.
Miller's experiment, conducted in 1953 by Stanley Miller, was designed to simulate early Earth conditions and test the hypothesis that organic compounds essential for life could have formed from inorganic substances in the early atmosphere. Miller used a mixture of methane, ammonia, hydrogen, and water vapor, which was exposed to electrical sparks (simulating lightning), resulting in the formation of amino acids.

Step 2: Diagrammatic representation.
In the experiment, Miller used a closed glass apparatus consisting of:
1. **Water flask** (representing Earth's oceans)
2. **Boiling flask** (simulating early Earth's atmosphere)
3. **Electrode** (producing electrical sparks)
4. **Condenser** (cooling the vapor to condense it back into liquid)
5. **Amino acid solution** formed in the collection chamber.

Step 3: Conclusion.
The experiment provided evidence that organic compounds, such as amino acids, could form under conditions thought to resemble those of early Earth.