Plant Responses

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Venus' flytrap (Dionaea muscipula), a carnivorous plant, has leaves that are hinged in the middle. In response to an insect landing on an open leaf, the leaf can snap shut in less than a second. Glands on the leaf's surface then secrete enzymes that digest the insect, providing the plant with nutrients it does not get from the poor soil in which it grows.

SECTION 1 Plant Hormones SECTION 2 Plant Movements SECTION 3 Seasonal Responses merican For project ideas from

• ScientificAmerican, visit

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^ the keyword HM6SAH.

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