Spec 8461
Revise AQA GCSE Biology 3.3.2 Plant defence responses with the question bank, lessons, revision guides, and flashcards.
Students should be able to describe physical and chemical plant defence responses. • Physical defence responses to resist invasion of microorganisms. Cellulose cell walls. Tough waxy cuticle on leaves. Layers of dead cells around stems (bark on trees) which fall off. • Chemical plant defence responses. Antibacterial chemicals. Poisons to deter herbivores. • Mechanical adaptations. Thorns and hairs deter animals. Leaves which droop or curl when touched. Mimicry to trick animals.
