AP BIOLOGY

Detailed explanation-1: -Solution: In many climbers, the leaf is modified into a thin-thread like coiled structure called tendril. A tendril stretches out and twines around a suitable object to provide support to the weak stems.

Detailed explanation-2: -tendril, in botany, plant organ specialized to anchor and support vining stems. Tendrils may be modified leaves, leaflets, leaf tips, or leaf stipules; they may, however, be derived as modified stem branches (e.g., grapes).

Detailed explanation-3: -In some plants with weak stems, the leaves are modified to form coiled thread-like structures called tendrils. The plants with weak stems can grow horizontally against a support as the tendrils coil around the support. Examples: garden pea plant, Cobaea scandens.

Detailed explanation-4: -tendril. noun. ten·dril ˈten-drəl. : a slender leafless winding stem by which some climbing plants fasten themselves to a support. : something that curls like a tendril.

Detailed explanation-5: -Stem tendrils are branch modifications that help the plant to climb. Leaf tendrils are leaf or leaflet modifications that emerge from leaf nodes and usually support the stem. Slender and spirally coiled tendrils develop from the auxiliary bud. The entire or part of a leaf gets modified into a tendril.