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Evolution MCQs for MDCAT

3 Evolution questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.

3 questionsBiology

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1Biologyendosymbiont theory

This theory says that “mitochondria and chloroplast area in effect ancient bacteria which now live inside the large cells”

  1. A.Darwin’s theory of evolution
  2. B.Lamarckism
  3. C.Neo-darwinsm
  4. D.Endosymbiont theory

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2Biologyanalogous vs homologous

The organs which are similar but differ in structure are called

  1. A.Analogous organs
  2. B.Homologous organs
  3. C.Convergent evolution
  4. D.Divergent evolution

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3Biologynatural selection

____ occurs because natural selection gives some alleles a batter chance of survival than others

  1. A.Fitness
  2. B.Evolution
  3. C.Crossing over
  4. D.Artificial selection

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How Evolution is examined

Evolution sits in the official PMDC Biology curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.

Biology carries 81 of the 180 questions in the real paper - 45% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 81questions are split across chapters, so no honest page can tell you “expect four from Evolution”. What the archive can tell you is what actually appeared: 3 Evolution questions out of the 77 Biology questions digitised so far.

Work through them with the explanations rather than checking answer letters. The explanation says why the other three options are wrong, and distractors get reused across years far more reliably than whole questions do.

Frequently asked questions

How many Evolution MCQs are on this page?
3, drawn from one past paper - the 2020 paper. Every one is transcribed from the real paper rather than written to look like a past paper question, and each carries the correct answer with a written explanation. 0 of them are readable in full without an account.
Is Evolution in the MDCAT 2026 syllabus?
Yes. Evolution is a chapter of the official PMDC Biology curriculum, and PMDC has confirmed the 2026 syllabus is unchanged from the 2025 revision, so everything on this page is still examinable.
How many Evolution questions come up in the MDCAT?
PMDC does not publish a per-chapter breakdown, so nobody can tell you a reliable number - be careful with pages that do. What can be counted is the paper as a whole: Biology is 81 of the 180 questions, and 4% of the Biology questions in our archive so far have come from Evolution.
Do these Evolution MCQs come with explanations?
Yes, and they are written from scratch rather than copied. An answer letter tells you nothing about why the other three options are wrong, which is the part that transfers to the next question. The first 0 questions of every paper are free to read in full; the rest need a pass.