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MDCAT Practice Test - Practice Test - Biology - Evolution - 2026 Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Biology - Evolution (Year 2026) | Quiz 2

11. When did the first prokaryotic cells appear on Earth?

3.5 billion years ago
2.5 billion years ago
1.5 billion years ago
500 million years ago

12. What event caused the rise of atmospheric oxygen?

Great Oxygen Event
Cambrian explosion
Permian extinction
Cretaceous extinction

13. Which theory explains the origin of mitochondria and chloroplasts?

Endosymbiotic theory
Theory of evolution
Germ theory
Cell theory

14. What event marks the sudden appearance of many animal phyla in the fossil record?

Cambrian explosion
Devonian explosion
Permian explosion
Carboniferous explosion

15. What gases were used in the Miller-Urey experiment?

Oxygen
Methane, ammonia, hydrogen, water vapor
Carbon dioxide
Nitrogen

16. What is the term for the most recent common ancestor of all current life?

LUCA
Prokaryote
Eukaryote
Bacterium

17. Which field provides evidence for evolution through distribution patterns?

Biogeography
Comparative anatomy
Molecular biology
Paleontology

18. What term describes independent evolution of similar features in unrelated species?

Convergent evolution
Divergent evolution
Parallel evolution
Coevolution

19. What process leads to homologous structures?

Divergent evolution
Convergent evolution
Adaptive radiation
Coevolution

20. What phenomenon explains the diversity of finches on the Galápagos Islands?

Adaptive radiation
Natural selection
Genetic drift
Gene flow

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