Previous Year Papers NEET Biology Class 12 – Evolution

Evolution is a fundamental chapter of NEET Biology Class 12 that explains the origin of life, evolutionary theories, natural selection, speciation, and adaptive mechanisms. Mastery of this chapter is essential for answering both theoretical and diagram-based NEET questions.

NEET previous year papers frequently include questions on evolution concepts, evidences, mechanisms, and human evolution. Practicing PYQs helps students strengthen understanding of evolutionary biology. Studentbro.in provides exam-focused material for effective preparation.

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Origin of Life – NEET PYQ Focus

• Primordial Soup Theory – Life originated from inorganic molecules through chemical evolution.

• Miller-Urey Experiment – Demonstrated synthesis of organic molecules under prebiotic conditions.

• Endosymbiotic Theory – Eukaryotic cells evolved from symbiotic prokaryotes.

NEET questions often test origin theories, experiments, and evidences supporting the origin of life.

Lamarckism – Important NEET Concepts

• Proposed by Jean-Baptiste Lamarck.

• Principle of Use and Disuse – Organs develop or degenerate based on use.

• Inheritance of Acquired Characters – Traits developed during lifetime are passed to offspring.

Previous year papers may ask to distinguish Lamarckism from Darwinism.

Darwinism – Key Concepts

• Proposed by Charles Darwin in “Origin of Species”.

• Natural Selection – Individuals with favorable variations survive and reproduce.

• Fitness – Ability of an organism to survive and leave offspring.

• Adaptation – Traits enhancing survival.

NEET PYQs often include examples of natural selection, types of adaptations, and Darwin’s evidences.

Modern Synthetic Theory of Evolution

• Combines Mendelian genetics with Darwinian natural selection.

• Explains evolution at population and molecular level.

• Key mechanisms: Mutation, Recombination, Gene Flow, Genetic Drift, Natural Selection.

NEET questions may test mechanisms causing variation and evolution.

Speciation – Formation of New Species

• Allopatric Speciation – Geographic isolation leads to new species.

• Sympatric Speciation – New species arise in same habitat due to genetic or ecological factors.

Previous year papers often include reproductive isolation and examples of speciation.

Evidences of Evolution

• Fossil Evidence – Shows gradual change over geological time.

• Anatomical Evidence – Homologous and analogous structures.

• Embryological Evidence – Similarities during embryonic development.

• Molecular Evidence – DNA and protein sequence comparisons.

NEET questions often ask to interpret evidences supporting evolution.

Human Evolution

• Evolution of humans from primate ancestors.

• Key stages: Australopithecus → Homo habilis → Homo erectus → Homo sapiens.

• Development of bipedalism, brain size, and tool use.

NEET PYQs may include timeline, characteristics, and adaptations of human evolution.

Importance of Previous Year Papers for NEET Biology

Practicing previous year papers helps students identify frequently asked topics, reinforce conceptual understanding, and improve speed. PYQs for Evolution focus on origin of life, evolutionary theories, natural selection, speciation, evidences, and human evolution.

Conclusion

Previous Year Papers of NEET Biology Class 12 Evolution are essential for mastering evolutionary biology. This chapter requires clear understanding of origin of life, Lamarckism, Darwinism, modern synthetic theory, speciation, evidences, and human evolution.

Regular practice of PYQs helps students enhance conceptual clarity, analytical skills, and confidence in NEET. Studentbro.in provides structured, reliable, and exam-focused content to help NEET aspirants succeed.