Multiple choice

Darwin could not explain

  1. over production

  2. variations

  3. survival of the fittest

  4. struggle for existence
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B Correct answer
Explanation

Darwin observed and documented variations in organisms but could not explain their origin or source. He explained over-production, survival of the fittest, and struggle for existence as key mechanisms of natural selection. Variations were known to exist, but their genetic basis (mutations and recombination) was discovered later.

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