NEET BIOLOGY

Detailed explanation-1: -Xylem is in the form of the letter Y. It is endarch, i.e., protoxylem lies towards the center of the stem. Xylem is made up of vessels, tracheids, xylem parenchyma and a few xylem fibers. Metaxylem generally consists of two large oval of rounded vessels lying at the upper two angles of xylem.

Detailed explanation-2: -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-3: -So, the correct answer is ‘Monocot stem’

Detailed explanation-4: -In monocots, the vascular bundles have a random appearance scattered throughout the stem. In contrast, they are arranged in a circle near the outer edge just below the epidermis in dicots (Fig. 2). In addition, monocots usually do not have a vascular cambium, and thus they are unable to undergo secondary growth.

Detailed explanation-5: -The xylem vessels are V or Y shaped. The protoxylem disintegrates forming protoxylem lacuna. Due to this, the vascular bundles appear skull-shaped.