Biology: Year 9 Term 4: Plant Defences 0.0 / 5 ? BiologyMicrobes and diseaseDefencesGCSEAQA Created by: Charlotte HerondaleCreated on: 17-12-18 18:11 Plants can be attacked by what 2 things? (2) Animals or microorganisms 1 of 5 What are the 3 types of defence? (3) Physical, Chemical, Mechanical 2 of 5 Name and describe 3 physical defence mechanisms (3) Cellulose cell walls prevent pathogens entering cells, Waxy cuticle is a barrier to pathogens, Bark falls off taking pathogens with it 3 of 5 Name and describe 2 chemical defence mechanisms (2) Antibacterial chemicals kill bacteria, Poison kills/injures animals 4 of 5 Name and describe 4 mechanical defence mechanisms (4) Thorns prevent animals eating plant, Hairy stems prevents bugs laying eggs, Moving when touched frightens animals, Mimicry deters predators 5 of 5
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