The thin layer of meristematic cells located between xylem and phloem is referred to as the:

A) apical meristem.
B) collenchyma.
C) cork cambium.
D) vascular cambium.
E) pith.

Meristematic Cells

Undifferentiated cells located in the growth regions of plants, capable of dividing and differentiating into various types of plant cells.

Vascular Cambium

A layer of plant tissue located between the xylem and phloem that contributes to secondary growth by producing new layers of vascular tissue.

Apical Meristem

A region of actively dividing cells at the tips of plant roots and shoots, responsible for primary growth.