Question

Match the columns:

Column I	Column II
A. Xylem vessels	1. Store food material
B. Xylem tracheids	2. Obliterated lumen
C. Xylem fibers	3. Perforated plates
D. Xylem parenchyma	4. Chisel like ends

A. A-3, B-4, C-2, D-1
B. A-4, B-3, C-2, D-1
C. A-3, B-2, C-1, D-4
D. A-2, B-1, C-4, D-3
E. A-1, B-2, C-3, D-4

Answer 1

As you know, various tissues perform specialized functions which are specific to the nature of its cells. Plants also have specialized cells or tissues that perform specific functions. The tissues are divided into two groups: meristematic and permanent tissues.

Complete answer:
The meristematic tissues are the specialized tissues which are actively dividing cells present in the region of active cell division called meristems. Some cells in plants lose their ability to divide and these are termed as permanent tissues. These are also of two types: simple and complex. Simple permanent tissues are present in mainly leaves, stems and mature roots. These are classified as parenchyma, sclerenchyma and collenchyma. The complex tissues are those which have specialized cells that are made of more than one type of cells, but work as a unit. These are xylem and phloem; xylem is the tissue that is responsible for the conduction of water, minerals and nutrients from roots to the other parts as well as mechanical support to the plant body whereas phloem transports the food to the various tissues of the plant. Xylem tissue has four types of cells. These are:

Xylem tracheids: these are elongated tube cells which are devoid of protoplasm and have tapering or chisel like ends.
Xylem vessels: these are also long and have large central cavities, vessels have perforated plates through which these are interconnected with the other units of the xylem tissue.
Xylem fibers: these have thickened walls and obliterated central lumens.
Xylem parenchyma: as the name suggests, these are parenchymatous cells which are used to store food in form of starch and help in radial conduction of water.

Hence, it is clear from the answer that the answers match to the alternative present in option-a. therefore, option A is the correct answer.

Note: The meristems are divided into primary and secondary meristems. Primary meristems are the regions which are developed during the early stages of the plant’s life. These constitute apical meristems and intercalary meristems. The second type of meristems generated by plants is secondary or lateral meristems that develop after the development of primary meristems.