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Question

Explain Stanley Miller's experiment with a neat labelled diagram.

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Solution

  • In the 1950s, biochemists Stanley Miller and Harold Urey conducted an experiment that demonstrated that several organic compounds could be formed spontaneously by forming the conditions of Earth's early atmosphere.
  • They designed an apparatus that held a mixture of gases similar to those found in Earth's early atmosphere over a pool of water, representing Earth's early ocean.
  • Electrodes delivered an electric current, simulating lightning, into the gas-filled chamber.
  • After allowing the experiment to run for one week, they analyzed the contents of the liquid pool.
  • They found that several organic amino acids had formed spontaneously from inorganic raw material.
  • Their experiments, along with considerable biological, and chemical evidence, lend support to the theory that the first life forms arose spontaneously through naturally occurring chemical reactions.

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