Lesson 3.4.4.1

3.4.4.1 Natural selection, adaptation and antibiotic resistance Quiz: AQA Biology, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 3.4.4.1, Natural selection, adaptation and antibiotic resistance: 20 multiple choice questions for the AQA Biology (7402), Unit 4: Genetic information, variation and relationships, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. In population genetics, what specifically defines genetic diversity?

    • Different gene alleles
    • Total cell count
    • Organism biomass
    • Chromosome number

  2. What raw material does genetic diversity provide for natural selection?

    • Constant phenotypes
    • Identical clones
    • Allelic variation
    • Uniform populations

  3. What happens to the frequency of advantageous alleles over generations in natural selection?

    • Disappears
    • Decreases
    • Increases
    • Stays constant

  4. What is the ultimate fate of a beneficial new allele within a surviving population?

    • Increased frequency
    • Complete suppression
    • Molecular degradation
    • Immediate deletion

  5. Which type of selection favours one phenotypic extreme and shifts the population mean?

    • Disruptive selection
    • Directional selection
    • Stabilising selection
    • Artificial selection

  6. Which type of selection preserves intermediate phenotypes by removing extremes?

    • Stabilising selection
    • Directional selection
    • Artificial selection
    • Disruptive selection

  7. Which type of selection is demonstrated by human birth weight?

    • Disruptive selection
    • Artificial selection
    • Stabilising selection
    • Directional selection

  8. What term describes a feature that improves survival or reproduction?

    • Selection
    • Speciation
    • Adaptation
    • Mutation

  9. Thick fur reducing heat loss is an example of which adaptation type?

    • Physiological
    • Behavioural
    • Biochemical
    • Anatomical

  10. What is the primary role of random mutation in natural selection?

    • Directing evolution
    • Removing harmful traits
    • Preventing competition
    • Creating new alleles

  11. Why is a logarithmic scale useful when plotting bacterial growth data?

    • It removes outliers
    • Growth is linear
    • Growth is exponential
    • It prevents errors

  12. What happens to a resistant allele frequency when an antibiotic is applied?

    • Becomes zero
    • Increases
    • Decreases
    • Stays constant

  13. Does natural selection cause individuals to evolve during their lifetime?

    • Yes
    • No
    • Only in animals
    • Only in bacteria

  14. What does a high level of genetic diversity provide when an environment changes?

    • Faster metabolism
    • Better survival chance
    • Reduced competition
    • Immediate mutation

  15. Nocturnal feeding in desert animals is an example of which adaptation type?

    • Anatomical
    • Structural
    • Behavioural
    • Physiological

  16. Along with anatomical adaptations, which other two types are specified?

    • Physiological and behavioural
    • Active and passive
    • Structural and functional
    • Chemical and physical

  17. Which type of selection favours intermediate body lengths while removing extremes?

    • Directional selection
    • Artificial selection
    • Disruptive selection
    • Stabilising selection

  18. What happens to an allele that is advantageous in only one specific environment?

    • Increases globally
    • Decreases everywhere
    • Increases locally
    • Remains constant

  19. Are all biological adaptations strictly physical structures?

    • Yes
    • Only in plants
    • No
    • Only in animals

  20. What type of selection causes the mean beak length in birds to shift over generations?

    • Disruptive selection
    • Stabilising selection
    • Artificial selection
    • Directional selection

All AQA Biology quizzes