Lesson 4.3.3.2

4.3.3.2 Plant defence responses Quiz: AQA Biology, Unit 3

20 questions

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Lesson 4.3.3.2, Plant defence responses: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 3: Infection and response, written with Revision Ninja.

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The 20 questions

  1. Which structural feature provides a physical barrier against plant pathogens?

    • Cellulose cell wall
    • Cytoplasm layer
    • Vacuole membrane
    • Chloroplast membrane
  2. What is the tough waxy layer on leaves called in the specification?

    • Cortex
    • Xylem
    • Epidermis
    • Cuticle
  3. What layers of dead cells around stems fall off as a defence?

    • Pith
    • Phloem
    • Bark
    • Cambium
  4. What type of chemical do some plants produce to kill invading bacteria?

    • Antiviral hormones
    • Antibacterial chemicals
    • Pheromone sprays
    • Antifungal enzymes
  5. Which chemical defence deters herbivores?

    • Cellulose
    • Sugars
    • Poisons
    • Starch
  6. Which mechanical adaptation deters herbivores from eating a plant?

    • Antibacterial chemicals
    • Thorns and hairs
    • Waxy cuticles
    • Cellulose walls
  7. How do leaves of some plants mechanically defend themselves when touched?

    • Releasing toxins
    • Changing colour
    • Falling off stems
    • Drooping and curling
  8. What mechanical adaptation involves a plant copying another object to trick animals?

    • Thorns
    • Antibacterial chemicals
    • Mimicry
    • Drooping leaves
  9. Which category of defence includes cellulose cell walls?

    • Hormonal defence
    • Physical defence
    • Mechanical adaptation
    • Chemical defence
  10. How many categories of plant defence does the specification list?

    • Three
    • Four
    • Five
    • Two
  11. What physical defence layer on plant leaves resists invasion by pathogens?

    • Dead bark layer
    • Stomatal guard cell
    • Tough waxy cuticle
    • Cellulose cell wall
  12. Which layer of dead cells around stems falls off to remove pathogens?

    • Bark layer
    • Phloem tube
    • Xylem vessel
    • Root cap
  13. A tree produces an antibacterial chemical after infection. Which category is this?

    • Physical defence
    • Hormonal coordination
    • Mechanical adaptation
    • Chemical defence
  14. A plant droops its leaves when touched by an insect. Which defence type is this?

    • Hormonal coordination
    • Physical defence
    • Mechanical adaptation
    • Chemical defence
  15. Why do some plants produce bitter poisons in their leaves?

    • Resist pathogens
    • Deter herbivores
    • Prevent water loss
    • Attract insects
  16. Which category of plant adaptation includes thorns and drooping leaves?

    • Physical response
    • Mechanical adaptation
    • Pathogenic defence
    • Chemical defence
  17. What type of defence response are cellulose cell walls and waxy cuticles?

    • Immune response
    • Chemical defence
    • Physical defence
    • Mechanical adaptation
  18. Which category of plant defence includes antibacterial chemicals and poisons?

    • Mechanical adaptation
    • Physical defence
    • Chemical defence
    • Structural barrier
  19. Which of these is a chemical defence response in plants?

    • Antibacterial chemicals
    • Leaf thorns
    • Dead cell bark
    • Tough waxy cuticle
  20. Which adaptation is classed as a mechanical defence in plants?

    • Antibacterial chemicals
    • Cellulose cell walls
    • Waxy cuticle
    • Plant mimicry

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