Karnataka 2nd PUC Biology Chapter 6 Evolution Important Questions 2027

Preparing for Evolution can be challenging when students need to remember theories, experiments, genetic principles and human evolution together. Karnataka 2nd PUC Biology Chapter 6 Important Questions 2027 simplifies this revision with MCQs and 1-, 2-, 3- and 5-mark questions covering the origin of life, Miller’s experiment, evidence of evolution, Darwin’s theory and the Hardy-Weinberg principle. Quick revision tables also help organise key concepts and important points.

The questions are based on the prescribed Karnataka 2nd PUC Biology syllabus. Students can first refer to the Karnataka 2nd PUC Syllabus 2026-27 to identify the required topics and then check the Karnataka 2nd PUC Exam Pattern 2027 to understand the question types, marks and preparation requirements.

Karnataka 2nd PUC Biology Chapter 6 Important Questions 

2nd PUC Biology Chapter 6 Important Questions with Answers cover key concepts of Evolution through MCQs on human evolution, evolutionary theories, fossils, Darwinism, mutation, homologous and analogous organs, and the Hardy–Weinberg principle. 

Q1. Homo habilis had a cranial capacity of nearly

• (A) 650–800 cc

• (B) 900 cc

• (C) 1400 cc

• (D) 1500 cc

Answer: (A) 650–800 cc. Homo habilis was the first human-like hominid.

Q2. Life was created by some supernatural power. This theory is

• (A) Abiogenesis

• (B) Spore theory

• (C) Special creation theory

• (D) Spontaneous generation

Answer: (C) Special creation theory.

Q3. Organs which have the same fundamental structure but different functions are called

• (A) Vestigial organs

• (B) Analogous organs

• (C) Homoplastic organs

• (D) Homologous organs

Answer: (D) Homologous organs. They show divergent evolution and common ancestry.

Q4. The study of fossils as evidence of evolution is called

• (A) Anatomy

• (B) Embryology

• (C) Palaeontology

• (D) Biogeography

Answer: (C) Palaeontology.

Q5. The material in which Hugo de Vries experimented to explain the mechanism of evolution thus pioneering the theory of mutations was

• (A) Fruit fly

• (B) China rose

• (C) Garden pea

• (D) Evening primrose

Answer: (D) Evening primrose.

Q6. Darwin's finches are found in

• (A) Tahiti

• (B) Tundra

• (C) Galapagos Island

• (D) None of these

Answer: (C) Galapagos Island.

Q7. Which of the following defines Hardy–Weinberg's law?

• (A) p2 + 2pq + q2 = 0

• (B) q2 + p2 + 2pq = 0

• (C) p2 + 2pq + q2 = 1

• (D) p2 + 3pq + q2 = 1

Answer: (C) p2 + 2pq + q2 = 1.

Q8. Analogous organs arise due to

• (A) Divergent evolution

• (B) Artificial selection

• (C) Genetic drift

• (D) Convergent evolution

Answer: (D) Convergent evolution.

Q9. For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be

• (A) 42 per cent

• (B) 49 per cent

• (C) 9 per cent

• (D) 58 per cent

Answer: (A) 42 per cent. The heterozygote frequency is 2pq, so 2 × 0.7 × 0.3 = 0.42.

Q10. First human like hominid is known as

• (A) Neanderthal man

• (B) Homo habilis

• (C) Dryopithecus

• (D) Homo erectus

Answer: (B) Homo habilis.

Q11. Single step large mutations leading to speciation is also called

• (A) Founder effect

• (B) Saltation

• (C) Branching ascent

• (D) Natural selection

Answer: (B) Saltation. The term was used by Hugo de Vries.

Q12. The primate which existed 15 mya was

• (A) Homo habilis

• (B) Australopithecus

• (C) Ramapithecus

• (D) Homo erectus

Answer: (C) Ramapithecus.

Karnataka 2nd PUC Biology Chapter 6 PDF

The 2nd PUC Biology Chapter 6 PDF has the chapter-wise MCQs for Evolution with the answer key. Students can save it for offline revision before tests.

Solve the Karnataka 2nd PUC Previous Year Question Paper and the Karnataka 2nd PUC Model Papers 2026-27 to see how these questions appear in a real paper. The Karnataka 2nd PUC Mid Term Question Paper is also useful for timed practice. 

Important Topics in Karnataka 2nd PUC Biology: Evolution

Go through these points first, then try the questions again:

• Origin of Life: The Big Bang theory, early Earth gases (methane, carbon dioxide, ammonia and water vapour) and Miller's experiment of 1953.

• Evidences for Evolution: Fossils, homologous and analogous organs, biochemical similarities and the embryological idea of Haeckel.

• Theories of Evolution: Adaptive radiation, Lamarck's use and disuse, Darwin's natural selection, industrial melanism and De Vries' mutation theory.

• Hardy-Weinberg Principle: The equation p2 + 2pq + q2 = 1 and the five factors that change allele frequency.

• Types of Selection: Stabilising, directional and disruptive selection.

• Human Evolution: The order from Dryopithecus to Homo sapiens with their brain size and habits.

Students who revise these six topics well can answer most of the questions in this chapter with ease.

How to Prepare for Karnataka 2nd PUC Biology Chapter 6

A simple 5-step plan to revise this chapter fast:

1. Learn the terms first: Homologous, analogous, adaptive radiation, saltation and genetic drift give easy marks.

2. Practise MCQs daily: Many questions are fact-based, so short daily practice works well.

3. Learn the Hardy-Weinberg equation: Practise small sums on p, q, p2, 2pq and q2.

4. Revise human evolution in order: Use the quick table and learn the time and brain size of each ancestor.

5. Solve previous year papers: Many questions repeat with small changes.

Karnataka 2nd PUC Biology Chapter 6 Important Questions 2027 cover the origin of life, evidence, theories, Hardy-Weinberg principle and human evolution in easy steps. Regular practice of the questions above will help you score full marks in Evolution.

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