AP BIOLOGY

Detailed explanation-1: -Midrib is the thickest vein present in the middle of the leaf. It separates the lamina or leaf blade into 2 parts. Smaller veins are observed radiating from the midrib.

Detailed explanation-2: -The thick veins present in the middle of the lamina extends from the petiole to the leaf apex and is called the midrib.

Detailed explanation-3: -∙ A leaf contains leaf base, a stalk like structure called petiole and lamina. ∙ The leaf lamina consists of a midrib, veins and veinlets arranged in the form of a network. ∙ The lines or branches arising from the midrib in leaf are known as veins. ∙ The long vein present in the middle of the lamina is known as midrib.

Detailed explanation-4: -The main vein is called the midrib. It is formed by a double pipeline of cells. One pipeline carries water and minerals to all the cells of the leaf. The other carries prepared food from the green cells to the other parts of the plant.