Honeybees tell each other how to find food by doing a dance. Rattlesnakes shake the rattle in their tails to warn they're about to bite. When monkeys spot a leopard, they shout out calls to warn of the approaching danger. But how does a tomato plant let others know mites are attacking it?
Plants can't communicate by moving or making sounds, like most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower's sweet fragrance, for example, comes from volatile compounds that the plant produces to attract insect pollinators such as bees.
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