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13 cards from this deck
Physical, chemical, and mechanical
Barrier preventing pathogen entry
Strong physical barrier vs pathogen invasion
Dead cell shield; falls off with pathogens
Deter herbivores from eating them
Kill bacteria & protect from infections
Mint and witch hazel
Make consumption difficult & painful for animals
Dislodge insects or move away from harm
Deter butterflies from laying eggs (avoid competition)
Less likely to be eaten by herbivores
Cinchona tree bark; main treatment for malaria
Willow tree bark/leaves; relieves pain & fever
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