Question

how tendrils are formed?

Answer 1

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In botany, a tendril is a specialized stem, leaves or petiole with a threadlike shape that is used by climbing plants for support, attachment and cellular invasion by parasitic plants, generally by twining around suitable hosts found by touch. They do not have a lamina or blade, but they can photosynthesize. They can be formed from modified shoots, modified leaves, or auxiliary branches and are sensitive to chemicals, often determining the direction of growth, as in species of Cuscuta

Answer 2

Tendrils are the threadlike structure and are modified stems or the leaves. The tendrils intertwine around whatever it touches. In this way it helps the plants with the weak stems to climb.