What is periderm?
A) special epidermal cells that regulate gas exchange
B) outer layer of the vascular cylinder in a plant root
C) layers of cells just inside root endodermis
D) dermal tissue that replaces epidermis on the surfaces of older stems and roots
E) tissue that consists of densely packed dead cells with thickened, waxy walls

Question

What is periderm?​
A) ​special epidermal cells that regulate gas exchange
B) ​outer layer of the vascular cylinder in a plant root
C) layers of cells just inside root endodermis​
D) ​dermal tissue that replaces epidermis on the surfaces of older stems and roots
E) ​tissue that consists of densely packed dead cells with thickened, waxy walls

Quizplus · Accepted Answer

Periderm is a dermal tissue that replaces the epidermis on the surfaces of older stems and roots. It consists of cork cells and phelloderm cells.

Note: Option E also describes periderm, but it is not a complete definition as periderm also includes phelloderm cells.

What Is Periderm?​

What Is Periderm?