Topic Details (Notes format)

Evolution and Genetic Variation

Subject: General Science

Book: NCERT Biology Class 12

Study of biological changes over generations.
- **Natural Selection and Speciation**:
- Darwin’s theory.
- **Genetic Drift and Mutations**:
- Role in evolution.
- **Human Evolution**:
- Fossil evidence and DNA studies.

**Possible Exam Questions:**
1. What is Darwin’s theory of natural selection?
2. How do mutations contribute to genetic variation?
3. Describe the significance of genetic drift in evolution.
4. What are the evidences supporting human evolution?
5. Explain how speciation occurs over time.

Practice Questions

What is the chemical symbol for gold?

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What type of electromagnetic radiation has the longest wavelength?

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What is the most common state of matter in the universe?

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Which particle is responsible for the negative charge of an atom?

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Which element is the most abundant in the Earth’s crust?

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What is the chemical symbol for the element iron?

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Which vitamin is essential for calcium absorption?

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