Question

Name the plant tissue having a dead cell.

Answer 1

Hint: A vascular bundle is a part of the transport system in vascular plants. The transport happens in the stem. The vascular bundle consists of mainly two types of tissues. In addition, it also has tissues for support and protection.

Complete answer:
The xylem consists of mainly two types of cells – xylem parenchyma and xylem fibres. Both types of cells give structural support to the tracheary parts of the xylem. The tracheary parts become completely dead at maturity. It is a pipe-like structure that allows water and the dissolved materials to flow through.

There are two types of tracheary elements: vessel elements and tracheids. Since the tracheary elements die when matured, they have a passive role in the transport of water through the plant. Also, the tracheary elements of the xylem have secondary cell wall thickenings which are ring-shaped. They provide maximum structural support.

The correct answer is xylem.

Additional Information: The bundle-sheath cells are photosynthetic cells. They are arranged in a tightly packed sheath that is present around the vein of a leaf. It provides a protective covering to the leaf vein. It consists of one or more cell layers. The cells are usually parenchyma.

Note: In a vascular bundle, the xylem normally lies adaxial and the phloem is positioned abaxial. In stems and roots, the xylem will be closer to the centre of the stem or root. In leaves, normally, the adaxial surface will be the upper side and the abaxial surface will be the lower side. The position of vascular bundles relative to each other greatly varies.