Evolution Mdcat Mcqs

 

MDCAT Preparation 2026

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Evolution – MDCAT MCQs

1. The idea that organisms change gradually over generations was first clearly proposed by:

A) Lamarck

B) Darwin

C) Wallace

D) Mendel

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2. According to Lamarck, evolution occurs due to:

A) Natural selection

B) Use and disuse of organs

C) Genetic mutations

D) Survival of the fittest

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3. The correct sequence of evolutionary events is:

A) Variation → Overproduction → Selection → Struggle

B) Overproduction → Variation → Struggle → Selection

C) Selection → Variation → Overproduction → Struggle

D) Variation → Selection → Overproduction → Struggle

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4. Homologous organs indicate:

A) Same function, different origin

B) Same origin, different function

C) Same origin, same function

D) Different origin, different function

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5. Wings of bat and wings of insect are examples of:

A) Homologous organs

B) Vestigial organs

C) Analogous organs

D) Atrophied organs

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6. Which of the following is a vestigial organ in humans?

A) Heart

B) Appendix

C) Kidney

D) Liver

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7. Survival of organisms best suited to their environment is known as:

A) Adaptation

B) Evolution

C) Natural selection

D) Mutation

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8. The forelimbs of man, whale, and bat show:

A) Analogous structures

B) Homologous structures

C) Vestigial structures

D) Adaptive radiation

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9. Adaptive radiation refers to:

A) Evolution of similar traits in different species

B) Evolution of many species from a common ancestor

C) Loss of organs due to disuse

D) Sudden appearance of new species

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10. Which evidence of evolution is based on embryos of different animals?

A) Fossil record

B) Comparative anatomy

C) Comparative embryology

D) Molecular biology

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11. Fossils are usually found in:

A) Igneous rocks

B) Metamorphic rocks

C) Sedimentary rocks

D) Lava rocks

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12. Which of the following supports Darwin’s theory most strongly?

A) Sudden creation

B) Inheritance of acquired characters

C) Natural selection

D) Use and disuse

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13. The connecting link between reptiles and birds is:

A) Archaeopteryx

B) Seymouria

C) Peripatus

D) Neopilina

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14. Evolution at genetic level mainly involves changes in:

A) Proteins

B) RNA

C) DNA

D) Enzymes

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15. Artificial selection differs from natural selection because it is carried out by:

A) Nature

B) Environment

C) Humans

D) Mutations

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✅ Answer Key

1. B

2. B

3. B

4. B

5. C

6. B

7. C

8. B

9. B

10. C

11. C

12. C

13. A

14. C

15. C