AP BIOLOGY

Detailed explanation-1: -Stele . The stele (or vascular cylinder) is in the central region of the root, where the xylem and phloem develop. In monocot roots, the stele contains an exterior ring of phloem and an interior ring of xylem arranged around the central pith.

Detailed explanation-2: -Monocot root In monocot roots, the vascular bundles are arranged in a circular pattern. Monocots and dicots contain two main types of vascular tissue: the xylem and phloem.

Detailed explanation-3: -Monocot Root. The monocot root is composed of an epidermis, cortex, endodermis, pericycle, xylem, phloem and a pith. Unlike dicot roots, a monocot root has a pith in the stele. It also contains vascular bundles that are composed of both xylem and phloem.

Detailed explanation-4: -Monocot stem The vascular tissue is arranged into bundles of xylem and phloem that are scattered throughout the ground tissue. Within each bundle, the phloem is located closer to the outside of the stem, and the xylem is located closer to the inside of the stem.

Detailed explanation-5: -Primary structure of monocot root Endodermis has barrel-shaped parenchyma without intercellular spaces. Casparian strips are little present but passage cells are absent. Pericycle gives lateral roots only, secondary growth is absent. Vascular bundles are radial; Xylem is an exarch, bundles more than six.