Evolution
Origin of life, Darwin's theory, Hardy-Weinberg, speciation
Key Concepts
- Darwin's theory: natural selection acts on heritable variation
- Hardy-Weinberg equilibrium: allele frequencies constant in absence of evolution
- Speciation: allopatric (geographic isolation) vs sympatric (same area)
- Analogous organs: similar function, different origin (convergent evolution)
- Homologous organs: similar origin, different function (divergent evolution)
Important Formulae
| Hardy-Weinberg | p + q = 1; p² + 2pq + q² = 1 |
Quick Tips
- Miller-Urey experiment: amino acids formed from inorganic molecules + energy under early Earth conditions.
- Genetic drift: random change in allele frequency, most significant in small populations.
- Lamarck: inheritance of acquired characters (wrong); Darwin: natural selection (correct mechanism).
Sample Practice Questions
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Industrial melanism in peppered moth is an example of:
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Answer: Natural selection
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The origin of life on Earth is estimated at approximately:
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Answer: 3.5–4 billion years ago
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The principle of competitive exclusion (Gause's law) states:
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Answer: Two species competing for exactly the same niche cannot coexist
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The first living organisms on Earth were most likely:
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Answer: Anaerobic prokaryotes
Practice Questions
Practice 20 randomly selected NEET questions on Evolution. Answers are revealed after each question.
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What are the key concepts in Evolution for NEET?
Darwin's theory: natural selection acts on heritable variation; Hardy-Weinberg equilibrium: allele frequencies constant in absence of evolution; Speciation: allopatric (geographic isolation) vs sympatric (same area); Analogous organs: similar function, different origin (convergent evolution); Homologous organs: similar origin, different function (divergent evolution).
Which formulae are important for Evolution in NEET?
Hardy-Weinberg: p + q = 1; p² + 2pq + q² = 1.
How can I practise NEET Evolution questions for free?
Practise free NEET Evolution questions with instant answers and explanations on Safe Learning for Kids — no sign-up required.