What is the primary mechanism driving adaptive evolution, as proposed by Darwin?

A Genetic drift

B Mutation

C Gene flow

D Natural selection

✓ Correct Answer: Option D

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, leading to populations becoming better adapted to their environment.

💡 Why is D) the correct answer?

The correct answer to the question "What is the primary mechanism driving adaptive evolution, as proposed by Darwin?" is Option D: Natural selection.

The other options — A) Genetic drift, B) Mutation, C) Gene flow — are incorrect for this IB Exam Prep question. As explained above: Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, leading to populations becoming better adapted to t…

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This 2-level IB Exam Prep question from the Biology topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free IB Exam Prep practice test or use flashcards for spaced repetition review.

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What is the primary mechanism driving adaptive evolution, as proposed by Darwin?

✓ Correct Answer: Option D

📚 About This IB Exam Prep Practice Question

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