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BIO NMDCAT Darwinism
nmdcat.online July 14, 2026

According to Darwin, the primary source of the raw material upon which natural selection acts is:

A. Environmental changes that directly modify the DNA of somatic cells.
B. Inherited somatic modifications acquired through physical exercise.
C. Random, heritable variations existing within individuals of a population.
✓
D. The geological forces that shift continental plates over time.

📝 Explanation

Darwin emphasized that natural selection relies on the pre-existing, heritable variations that naturally occur among individuals within any wild population.

📖 Additional Information

  • Environmental changes that directly modify the DNA of somatic cells.
  • Inherited somatic modifications acquired through physical exercise.
  • Random, heritable variations existing within individuals of a population.
  • The geological forces that shift continental plates over time.

Darwin emphasized that natural selection relies on the pre-existing, heritable variations that naturally occur among individuals within any wild population.

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