AP BIOLOGY

Detailed explanation-1: -Pith, or medulla, is a tissue in the stems of vascular plants. Pith is composed of soft, spongy parenchyma cells, which in some cases can store starch. In eudicotyledons, pith is located in the center of the stem. In monocotyledons, it extends also into flowering stems and roots.

Detailed explanation-2: -Pith is composed of undifferentiated parenchyma cells, which function in storage of nutrients, and in eudicots is located in the center of the stem.

Detailed explanation-3: -Pith parenchyma cells function as a water storage tissue in plant stems, and the death of these cells reduces stem water content.

Detailed explanation-4: -Pith: At the very center of the tree is the pith, which is the oldest part of the tree. The pith, together with the tree’s first few annual rings, is called juvenile wood. The pith area has a greater tendency to crack than the rest of the wood in a tree. Try to avoid carving pieces of wood that include the pith.

Detailed explanation-5: -Dicot Stems In the dicot stem, the vascular bundles are arranged in a ring, with pith concentrated at the core of the stem, rather than being scattered throughout the plant interior. In each vascular bundle, the xylem and phloem are separated by a substance called vascular cambium.