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For one, not too many people know that caffeine, which is found in coffee, tea, chocolate, mate, etc. is a natural insectiside the plants produce. Insects become paralized when they consume the caffeine which is in those plants.

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Q: How plants have chemical defenses and physical defenses?
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What are two examples of chemical plant defenses?

Production of toxic compounds such as alkaloids or terpenoids that deter herbivores. Emitting volatile organic compounds to attract predators of herbivores to help protect the plant.


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