In Miller's experiment, the control contained all the ingredients except

Options

A. Electric sparks
B. Condenser
C. Boiling apparatus
D. Methane

Answer

**Step-by-Step Solution:**

1. **Understanding Miller's Experiment**: Miller's experiment was designed to simulate the conditions of early Earth to test the hypothesis of abiogenesis, which suggests that organic compounds could form from inorganic materials.

2. **Components of the Experiment**: The experiment included several key ingredients: water, methane, ammonia, and hydrogen. These were believed to represent the primordial atmosphere of Earth.

3. **Role of Electric Spark**: In the experimental setup, an electric spark was introduced to simulate lightning, which was thought to provide the energy necessary for chemical reactions to occur, leading to the formation of organic molecules like amino acids.

4. **Control Setup**: In scientific experiments, a control is used to compare the effects of the experimental variable. In Miller's experiment, the control contained all the same ingredients as the experimental setup but did not include the electric spark.

5. **Results of the Control**: The control setup, without the electric spark, did not produce any organic compounds, demonstrating the importance of the spark in facilitating the chemical reactions necessary for the formation of organic molecules.

6. **Conclusion**: Therefore, the answer to the question is that in Miller's experiment, the control contained all the ingredients except the electric spark.

**Final Answer**: The control contained all the ingredients except the electric spark.

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