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Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Plant Defence Responses Flashcards

All 6 cards in this deck

Give three physical defence responses of plants.: Cellulose cell walls; a tough waxy cuticle on leaves; layers of dead cells around stems (bark on trees) which fall off.
Give two chemical defence responses of plants.: Antibacterial chemicals, and poisons to deter herbivores.
Give three mechanical adaptations that defend plants.: Thorns and hairs to deter animals; leaves which droop or curl when touched; mimicry to trick animals.
True or false? Sharp thorns on a plant are a chemical defence response.: False. Thorns are a mechanical adaptation, which deters herbivores from damaging the plant.
How does mimicry defend a plant?: The plant looks like another organism, so animals are tricked or deceived and avoid eating it.
What does the tough waxy cuticle on leaves do to protect the plant?: Acts as a physical barrier that resists invasion by microorganisms (pathogens) entering the leaf.