Define petiole and lamina.

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Petiole: The petiole is a slender stalk that connects the leaf blade or lamina to the stem of a plant. It serves as a support structure for the leaf, allowing it to be positioned optimally to capture sunlight for photosynthesis. The petiole may vary in length, thickness, and texture depending on...
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Petiole: The petiole is a slender stalk that connects the leaf blade or lamina to the stem of a plant. It serves as a support structure for the leaf, allowing it to be positioned optimally to capture sunlight for photosynthesis. The petiole may vary in length, thickness, and texture depending on the plant species and environmental conditions. Some leaves lack a distinct petiole and are said to be sessile, meaning they attach directly to the stem without a stalk. Lamina: Also known as the leaf blade, the lamina is the broad, flattened, and typically green part of the leaf where photosynthesis primarily occurs. It is attached to the petiole and extends outward from it. The lamina is responsible for capturing sunlight, exchanging gases with the atmosphere (such as carbon dioxide and oxygen), and transpiring water vapor. The shape, size, and surface characteristics of the lamina can vary greatly among different plant species and can be important identifiers in botanical classification. read less
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