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

13. The Oparin-Haldane hypothesis proposed that the earliest organic compounds accumulated primarily in:

A. The upper atmosphere
B. Deep underground rocks
C. Primitive oceans forming a "primordial soup"
✓
D. Polar ice sheets

📝 Explanation

Correct: Organic molecules collected in ancient oceans where further chemical evolution occurred. A, B, D: These were not proposed as the primary site of accumulation. Concept: Primordial soup hypothesis.

📖 Additional Information

  • The upper atmosphere
  • Deep underground rocks
  • Primitive oceans forming a "primordial soup"
  • Polar ice sheets

Correct: Organic molecules collected in ancient oceans where further chemical evolution occurred. A, B, D: These were not proposed as the primary site of accumulation. Concept: Primordial soup hypothesis.

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