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Question

Match the column.
List 1List 2
A.Living part of xylem1.Xylem fiber
B.Dead part of phloem2.Xylem parenchyma
C.Living part of phloem3.Companion cell
D.Dead part of xylem4.Phloem fiber


A
A- 2, B- 4, C- 3, D- 1
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B
A- 1, B- 4, C- 3, D- 2
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C
A- 2, B- 3, C- 4, D- 1
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D
A- 3, B- 4, C- 2, D- 1
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Solution

The correct option is A A- 2, B- 4, C- 3, D- 1
Living part of xylem - Xylem parenchyma
Dead part of phloem - Phloem fiber
Living part of phloem - Companion cell
Dead part of xylem - Xylem fiber

Xylem parenchyma: This is the only living component in the xylem tissue. It is represented by groups of parenchyma cells that are found in between the vessels and the fibers. They are meant for the storage of reserve food.
Phloem fiber: Phloem fibers are represented by the dead sclerenchyma fibers that are found in between the sieve tubes. They are meant only for providing mechanical support
Companion cell: They are more or less spindle-shaped cells associated with the sieve tube cells. Each companion cell is found attached to anyone lateral surface of a sieve cell. The companion cell and the neighbouring sieve cell together represent a pair of sister cells. The companion cell has a granular cytoplasm, prominent nucleus and one or two small vacuoles. The nucleus of the companion cell is said to be capable of exerting its influence on the adjacent sieve cells.
Xylem Fibres: They are represented by the dead sclerenchyma fibers that are found in between the vessels and the tracheids. They are meant for providing mechanical support to the essential elements.

Biology

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