AP BIOLOGY

Detailed explanation-1: -To support the weak and thin stems, the terminal leaves are modified into thin, wiry, coiled structure called tendrils. Tendrils coil around the nearby objects and support the plant to climb up. Leaf tendrils are found in pea plants.

Detailed explanation-2: -Function of Tendril They are known to be modified portions of leaf, stem or petiole. Their main function is to provide support to the plant as it climbs up a structure. By doing so they allow a plant to find a more suitable area to grow due to more light. When stems are modified into tendril they help plants to climb.

Detailed explanation-3: -Tendrils: Peas are a good example of a plant that uses tendrils to climb. Tendrils are skinny, wiry structures along the plant’s stem that actually reach around in the air until they come into contact with something they can grab.

Detailed explanation-4: -Tendril is a threadlike specialized stem, leaf or petiole used by climbing plants for support and attachment. The spiral contraction which occurs after a tendril has caught an object is of great use to the climbing plant. The spiral contraction can drags up the shoot thus there is no waste of growth.

Detailed explanation-5: -Stem tendril climbers are a very effective growth type within the group of climbing plants. They form mobile and touch-sensitive tendrils (extensions which are actually modified stems) that wind themselves around objects, stabilising the upward-growing plant.