AP BIOLOGY

Detailed explanation-1: –Haptonasti or thigmonasty is defiend as the non-directional movement of plants when their parts are in contact with any object.-When an insect comes in contact with Venus fly trap then it’s lamina is closed which is the type of haptonasti.

Detailed explanation-2: -Example: The Venus Fly Trap is a plant that shows thigmotropism. It closes when a bug or some other object touches it.

Detailed explanation-3: -The non-growth movement in response to an environmental stimulus is called nastic movement. The venus fly trap shows a response to the stimulus of touch when the insect sits on it by closing its leaves.

Detailed explanation-4: -The “trap” is made of two hinged lobes at the end of each leaf. On the inner surfaces of the lobes are hair-like projections called trichomes that cause the lobes to snap shut when prey comes in contact with them. This type of movement is called thigmonasty-a nondirectional plant response to being touched.

Detailed explanation-5: -The Venus flytrap is an example of an insectivorous plant. These plants feed on insects to supplement some nutrients, such as nitrogen, that are lacking in the soil the plant grows in, such as subtropical wetlands.