Plant defence responses (4.3.3.2) | AQA GCSE Biology - Higher Tier - (8461) | KnowledgeSet

Plant defence responses

Biology (Separate Science) · GCSE · AQA · AQA GCSE Biology - Higher Tier - (8461) · Specification point · 4.3.3.2 · Infection and response · Plant disease (biology only)

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Learning Objectives

4.3.3.2 Plant defence responses

Content	Key opportunities for skills development
$Students should be able to describe physical and chemical plant defence responses. Physical defence responses to resist invasion of microorganisms. • Cellulose cell walls. • Tough waxy cuticle on leaves. • Layers of dead cells around stems (bark on trees) which fall off. Chemical plant defence responses. • Antibacterial chemicals. • Poisons to deter herbivores. Mechanical adaptations. • Thorns and hairs deter animals. • Leaves which droop or curl when touched. • Mimicry to trick animals.$	$There are links with this content to Adaptations.$

Content

Key opportunities for skills development

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.

There are links with this content to Adaptations.