Plant defence responses

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

Plant barriers against microorganisms

Plant chemical defences

Plant non-chemical defences against animals

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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.

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