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Rajasthan Board Class 12 (RBSE) Evolution — practice questions

Explore 32 free Evolution questions in Rajasthan Board Class 12 (RBSE) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Evolution questions and exercises with answers

Showing questions 1–30 of 32.

The mechanism of evolution proposed by Darwin isRead the answer and worked solution →The Miller-Urey experiment (1953) demonstrated that:Read the answer and worked solution →Charles Darwin's mechanism of evolution is best described as:Read the answer and worked solution →The Hardy-Weinberg principle's equation for genotype frequencies is:Read the answer and worked solution →The wings of insects and the wings of birds are best described as:Read the answer and worked solution →The human APPENDIX is a classic example of a:Read the answer and worked solution →The shift in peppered moth (Biston betularia) colour during the Industrial Revolution is an example of:Read the answer and worked solution →The 14 species of finches that Darwin observed on the Galapagos Islands are a classic example of:Read the answer and worked solution →Genetic drift is STRONGEST in which type of population?Read the answer and worked solution →Homo sapiens (modern humans) first evolved in:Read the answer and worked solution →Sort limbs by shared ancestryRead the answer and worked solution →Complete the chain from chemistry to lifeRead the answer and worked solution →True or false: variation and fitnessRead the answer and worked solution →Which process is this?Read the answer and worked solution →Darwin and selectionRead the answer and worked solution →True or false: how new species appearRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every factor the chapter says can lead to new speciesRead the answer and worked solution →Order the sequence the chapter sets outRead the answer and worked solution →Reading the mechanisms backRead the answer and worked solution →True or false: evidence for evolutionRead the answer and worked solution →Chance or selection?Read the answer and worked solution →OriginsRead the answer and worked solution →Flip and pair: process with driverRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Assertion and reason: mechanismsRead the answer and worked solution →Two true, one falseRead the answer and worked solution →

Worked practice questions

The mechanism of evolution proposed by Darwin is

  1. inheritance of acquired characters
  2. natural selection
  3. use and disuse of organs
  4. saltational mutation
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Correct answer: B. natural selection

Darwin and Wallace proposed natural selection: variations in offspring + differential survival/reproduction → adaptive change over generations. Lamarck had proposed inheritance of acquired characters earlier modern genetics has shown that mechanism doesn't work.

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The Miller-Urey experiment (1953) demonstrated that:

  1. Amino acids could form from inorganic gases + electric sparks
  2. Mitochondria could evolve from bacterial symbionts
  3. DNA could replicate independently outside the cell
  4. Proteins could spontaneously self-assemble into cells
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Correct answer: A. Amino acids could form from inorganic gases + electric sparks

Miller-Urey simulated early Earth's atmosphere (NH3, CH4, H2O, H2) + electric sparks (lightning) and generated amino acids. Showed that life's building blocks can form from inorganic precursors.

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Charles Darwin's mechanism of evolution is best described as:

  1. Inheritance of acquired characteristics
  2. Spontaneous generation
  3. Natural selection
  4. Use and disuse of organs
Show answer and solution

Correct answer: C. Natural selection

**Darwin's mechanism:** NATURAL SELECTION. Heritable variation + competition + differential survival = evolution. The 'inheritance of acquired characteristics' is Lamarck's (rejected). 'Use and disuse' is also Lamarck.

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More Biology topics

Reproduction In OrganismsBiotechnology ApplicationsReproductive HealthHuman Health and DiseaseMolecular Basis of InheritanceMicrobes in Human WelfarePrinciples of Inheritance and VariationPrinciples Of Inheritance