Class 12 Biology — Chapter 6: Evolution
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Biology Chapter 6, "Evolution", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Evolution" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Evolution, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Biology mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Evolution (Class 12 Biology)
This chapter covers the origin of life, evidence for evolution, Darwinian natural selection, the Hardy–Weinberg principle, and human evolution.
- Origin of life
- Chemical evolution (Oparin–Haldane), supported by the Miller–Urey experiment, preceded the first cellular life.
- Evidence for evolution
- Homologous (divergent) and analogous (convergent) organs, fossils, and molecular similarities support common descent.
- Natural selection
- Darwin's theory: variation + struggle for existence → survival and reproduction of the fittest, leading to adaptation over time.
- Hardy–Weinberg principle
- Allele frequencies stay constant in an ideal population; p² + 2pq + q² = 1. Deviation indicates evolution is occurring.
- Human evolution
- A sequence from Dryopithecus/Ramapithecus through Australopithecus and Homo habilis/erectus to Homo sapiens.
Key formulas — Evolution
💡 Exam tips for Evolution
- Homologous organs = common ancestry (divergent evolution); analogous organs = similar function (convergent evolution).
- Any factor disturbing Hardy–Weinberg equilibrium (selection, drift, migration, mutation) drives evolution.
Sample questions
Theory of natural selection by:
Origin of Species, 1859.
Homologous organs (e.g., human arm, whale flipper, bat wing):
Divergent evolution.
Hardy-Weinberg principle holds when:
Allele frequencies remain constant.
Evolution — FAQs
What are the key concepts in Class 12 Biology Evolution?+
This chapter covers the origin of life, evidence for evolution, Darwinian natural selection, the Hardy–Weinberg principle, and human evolution. Key ideas include Origin of life, Evidence for evolution, Natural selection, Hardy–Weinberg principle, Human evolution.
What does Class 12 Biology Chapter 6 (Evolution) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Evolution" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Evolution" questions free to practise?+
Yes — sign in with Google to practise "Evolution" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Evolution" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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