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BIO NMDCAT Concept of Evolution
nmdcat.online July 14, 2026

3. The Miller-Urey experiment provided evidence that:

A. DNA molecules formed spontaneously from living cells.
B. Organic molecules can form from inorganic substances under simulated early Earth conditions.
✓
C. The first cells evolved into multicellular organisms.
D. Life can only arise from pre-existing life.

📝 Explanation

Correct: Miller and Urey synthesized amino acids from simple gases using electrical sparks. A: DNA was not produced. C: Not investigated. D: Describes biogenesis, not the experiment. Concept: Experimental evidence for chemical evolution.

📖 Additional Information

  • DNA molecules formed spontaneously from living cells.
  • Organic molecules can form from inorganic substances under simulated early Earth conditions.
  • The first cells evolved into multicellular organisms.
  • Life can only arise from pre-existing life.

Correct: Miller and Urey synthesized amino acids from simple gases using electrical sparks. A: DNA was not produced. C: Not investigated. D: Describes biogenesis, not the experiment. Concept: Experimental evidence for chemical evolution.

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