By Team Aakash Byju's | 2nd December 2022

Are You Familiar With Cells in Plants?

Xylem parenchyma cells are living, thin-walled and lignified.

Sclerenchyma cells are usually dead and without protoplasts.

Companion cells are specialised sclerenchyma cells.

Which of the following statements is true?

Collenchyma occurs in layers below the epidermis in monocot plants.

A.

B.

C.

D.

Detailed Explanation

The correct answer is C. Sclerenchyma cells are usually dead and without protoplasts.

Arrow

In stems and leaves of monocots, collenchyma is absent; instead, sclerenchyma is present.

Sclerenchyma Tissue

Longitudinal View

Cross-Section View

Xylem parenchyma consists of live cells with thick and lignified secondary cell walls.

Trachieds And its Cells

Perforation plates

Tracheids

Vessel  members

Fibre

The sclerenchyma tissues are dead cells. They lose their protoplasm content on attaining maturity.

Sclerenchyma Tissue

Transparent Section

Longitudinal Section

A companion cell is a member of the sieve tube that is connected to one or more specialised parenchyma cells.

Longitudinal View

Cross-Section View

Xylem Parenchyma Tissue

Phloem fibres are generally found in the secondary phloem.

Phloem Fibres