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

20. Which conclusion is most strongly supported by current scientific understanding of the origin of life?

A. Life appeared suddenly as fully developed organisms.
B. Organic molecules likely formed before the first cells evolved.
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C. Modern organisms continue to arise spontaneously from non-living matter.
D. Oxygen-rich conditions were essential for the formation of amino acids.

📝 Explanation

Correct: Evidence from chemical evolution and laboratory experiments supports the formation of organic molecules before living cells. A: Contradicts evolutionary theory. C: Spontaneous generation has been disproved. D: Oxygen inhibits, rather than promotes, prebiotic synthesis. Concept: Modern scientific view of the origin of life.

📖 Additional Information

  • Life appeared suddenly as fully developed organisms.
  • Organic molecules likely formed before the first cells evolved.
  • Modern organisms continue to arise spontaneously from non-living matter.
  • Oxygen-rich conditions were essential for the formation of amino acids.

Correct: Evidence from chemical evolution and laboratory experiments supports the formation of organic molecules before living cells. A: Contradicts evolutionary theory. C: Spontaneous generation has been disproved. D: Oxygen inhibits, rather than promotes, prebiotic synthesis. Concept: Modern scientific view of the origin of life.

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